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Description: Bound the error term in the series of log2cnv . (Contributed by Mario Carneiro, 7-Apr-2015)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | log2tlbnd | |- ( N e. NN0 -> ( ( log ` 2 ) - sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) e. ( 0 [,] ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fzfid | |- ( N e. NN0 -> ( 0 ... ( N - 1 ) ) e. Fin ) |
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| 2 | elfznn0 | |- ( n e. ( 0 ... ( N - 1 ) ) -> n e. NN0 ) |
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| 3 | 2re | |- 2 e. RR |
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| 4 | 3nn | |- 3 e. NN |
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| 5 | 2nn0 | |- 2 e. NN0 |
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| 6 | simpr | |- ( ( N e. NN0 /\ n e. NN0 ) -> n e. NN0 ) |
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| 7 | nn0mulcl | |- ( ( 2 e. NN0 /\ n e. NN0 ) -> ( 2 x. n ) e. NN0 ) |
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| 8 | 5 6 7 | sylancr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 2 x. n ) e. NN0 ) |
| 9 | nn0p1nn | |- ( ( 2 x. n ) e. NN0 -> ( ( 2 x. n ) + 1 ) e. NN ) |
|
| 10 | 8 9 | syl | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 2 x. n ) + 1 ) e. NN ) |
| 11 | nnmulcl | |- ( ( 3 e. NN /\ ( ( 2 x. n ) + 1 ) e. NN ) -> ( 3 x. ( ( 2 x. n ) + 1 ) ) e. NN ) |
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| 12 | 4 10 11 | sylancr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 3 x. ( ( 2 x. n ) + 1 ) ) e. NN ) |
| 13 | 9nn | |- 9 e. NN |
|
| 14 | nnexpcl | |- ( ( 9 e. NN /\ n e. NN0 ) -> ( 9 ^ n ) e. NN ) |
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| 15 | 13 6 14 | sylancr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 9 ^ n ) e. NN ) |
| 16 | 12 15 | nnmulcld | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. NN ) |
| 17 | nndivre | |- ( ( 2 e. RR /\ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. NN ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
|
| 18 | 3 16 17 | sylancr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
| 19 | 18 | recnd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. CC ) |
| 20 | 2 19 | sylan2 | |- ( ( N e. NN0 /\ n e. ( 0 ... ( N - 1 ) ) ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. CC ) |
| 21 | 1 20 | fsumcl | |- ( N e. NN0 -> sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. CC ) |
| 22 | eqid | |- ( ZZ>= ` N ) = ( ZZ>= ` N ) |
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| 23 | nn0z | |- ( N e. NN0 -> N e. ZZ ) |
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| 24 | eluznn0 | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> n e. NN0 ) |
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| 25 | oveq2 | |- ( k = n -> ( 2 x. k ) = ( 2 x. n ) ) |
|
| 26 | 25 | oveq1d | |- ( k = n -> ( ( 2 x. k ) + 1 ) = ( ( 2 x. n ) + 1 ) ) |
| 27 | 26 | oveq2d | |- ( k = n -> ( 3 x. ( ( 2 x. k ) + 1 ) ) = ( 3 x. ( ( 2 x. n ) + 1 ) ) ) |
| 28 | oveq2 | |- ( k = n -> ( 9 ^ k ) = ( 9 ^ n ) ) |
|
| 29 | 27 28 | oveq12d | |- ( k = n -> ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) = ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) |
| 30 | 29 | oveq2d | |- ( k = n -> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) = ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 31 | eqid | |- ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) = ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) |
|
| 32 | ovex | |- ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. _V |
|
| 33 | 30 31 32 | fvmpt | |- ( n e. NN0 -> ( ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ` n ) = ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 34 | 24 33 | syl | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ` n ) = ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 35 | 24 18 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
| 36 | 31 | log2cnv | |- seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) ~~> ( log ` 2 ) |
| 37 | seqex | |- seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. _V |
|
| 38 | fvex | |- ( log ` 2 ) e. _V |
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| 39 | 37 38 | breldm | |- ( seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) ~~> ( log ` 2 ) -> seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. dom ~~> ) |
| 40 | 36 39 | mp1i | |- ( N e. NN0 -> seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. dom ~~> ) |
| 41 | nn0uz | |- NN0 = ( ZZ>= ` 0 ) |
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| 42 | id | |- ( N e. NN0 -> N e. NN0 ) |
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| 43 | 33 | adantl | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ` n ) = ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 44 | 43 19 | eqeltrd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ` n ) e. CC ) |
| 45 | 41 42 44 | iserex | |- ( N e. NN0 -> ( seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. dom ~~> <-> seq N ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. dom ~~> ) ) |
| 46 | 40 45 | mpbid | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) e. dom ~~> ) |
| 47 | 22 23 34 35 46 | isumrecl | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
| 48 | 47 | recnd | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. CC ) |
| 49 | 0zd | |- ( N e. NN0 -> 0 e. ZZ ) |
|
| 50 | 36 | a1i | |- ( N e. NN0 -> seq 0 ( + , ( k e. NN0 |-> ( 2 / ( ( 3 x. ( ( 2 x. k ) + 1 ) ) x. ( 9 ^ k ) ) ) ) ) ~~> ( log ` 2 ) ) |
| 51 | 41 49 43 19 50 | isumclim | |- ( N e. NN0 -> sum_ n e. NN0 ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) = ( log ` 2 ) ) |
| 52 | 41 22 42 43 19 40 | isumsplit | |- ( N e. NN0 -> sum_ n e. NN0 ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) = ( sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) + sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) ) |
| 53 | 51 52 | eqtr3d | |- ( N e. NN0 -> ( log ` 2 ) = ( sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) + sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) ) |
| 54 | 21 48 53 | mvrladdd | |- ( N e. NN0 -> ( ( log ` 2 ) - sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) = sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 55 | 3 | a1i | |- ( ( N e. NN0 /\ n e. NN0 ) -> 2 e. RR ) |
| 56 | 0le2 | |- 0 <_ 2 |
|
| 57 | 56 | a1i | |- ( ( N e. NN0 /\ n e. NN0 ) -> 0 <_ 2 ) |
| 58 | 16 | nnred | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. RR ) |
| 59 | 16 | nngt0d | |- ( ( N e. NN0 /\ n e. NN0 ) -> 0 < ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) |
| 60 | divge0 | |- ( ( ( 2 e. RR /\ 0 <_ 2 ) /\ ( ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. RR /\ 0 < ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) -> 0 <_ ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
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| 61 | 55 57 58 59 60 | syl22anc | |- ( ( N e. NN0 /\ n e. NN0 ) -> 0 <_ ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 62 | 24 61 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 <_ ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 63 | 22 23 34 35 46 62 | isumge0 | |- ( N e. NN0 -> 0 <_ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 64 | oveq2 | |- ( k = n -> ( ( 1 / 9 ) ^ k ) = ( ( 1 / 9 ) ^ n ) ) |
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| 65 | 64 | oveq2d | |- ( k = n -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) ) |
| 66 | eqid | |- ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) = ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) |
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| 67 | ovex | |- ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) e. _V |
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| 68 | 65 66 67 | fvmpt | |- ( n e. NN0 -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) ) |
| 69 | 68 | adantl | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) ) |
| 70 | 9cn | |- 9 e. CC |
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| 71 | 70 | a1i | |- ( ( N e. NN0 /\ n e. NN0 ) -> 9 e. CC ) |
| 72 | 13 | nnne0i | |- 9 =/= 0 |
| 73 | 72 | a1i | |- ( ( N e. NN0 /\ n e. NN0 ) -> 9 =/= 0 ) |
| 74 | nn0z | |- ( n e. NN0 -> n e. ZZ ) |
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| 75 | 74 | adantl | |- ( ( N e. NN0 /\ n e. NN0 ) -> n e. ZZ ) |
| 76 | 71 73 75 | exprecd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 1 / 9 ) ^ n ) = ( 1 / ( 9 ^ n ) ) ) |
| 77 | 76 | oveq2d | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 1 / ( 9 ^ n ) ) ) ) |
| 78 | nn0mulcl | |- ( ( 2 e. NN0 /\ N e. NN0 ) -> ( 2 x. N ) e. NN0 ) |
|
| 79 | 5 78 | mpan | |- ( N e. NN0 -> ( 2 x. N ) e. NN0 ) |
| 80 | nn0p1nn | |- ( ( 2 x. N ) e. NN0 -> ( ( 2 x. N ) + 1 ) e. NN ) |
|
| 81 | 79 80 | syl | |- ( N e. NN0 -> ( ( 2 x. N ) + 1 ) e. NN ) |
| 82 | nnmulcl | |- ( ( 3 e. NN /\ ( ( 2 x. N ) + 1 ) e. NN ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
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| 83 | 4 81 82 | sylancr | |- ( N e. NN0 -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
| 84 | nndivre | |- ( ( 2 e. RR /\ ( 3 x. ( ( 2 x. N ) + 1 ) ) e. NN ) -> ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) e. RR ) |
|
| 85 | 3 83 84 | sylancr | |- ( N e. NN0 -> ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) e. RR ) |
| 86 | 85 | recnd | |- ( N e. NN0 -> ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) e. CC ) |
| 87 | 86 | adantr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) e. CC ) |
| 88 | 15 | nncnd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 9 ^ n ) e. CC ) |
| 89 | 15 | nnne0d | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 9 ^ n ) =/= 0 ) |
| 90 | 87 88 89 | divrecd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) / ( 9 ^ n ) ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 1 / ( 9 ^ n ) ) ) ) |
| 91 | 2cnd | |- ( ( N e. NN0 /\ n e. NN0 ) -> 2 e. CC ) |
|
| 92 | 83 | adantr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
| 93 | 92 | nncnd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. CC ) |
| 94 | 92 | nnne0d | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) =/= 0 ) |
| 95 | 91 93 88 94 89 | divdiv1d | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) / ( 9 ^ n ) ) = ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 96 | 77 90 95 | 3eqtr2d | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) = ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 97 | 69 96 | eqtrd | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 98 | 24 97 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 99 | 92 15 | nnmulcld | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) e. NN ) |
| 100 | nndivre | |- ( ( 2 e. RR /\ ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) e. NN ) -> ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
|
| 101 | 3 99 100 | sylancr | |- ( ( N e. NN0 /\ n e. NN0 ) -> ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
| 102 | 24 101 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR ) |
| 103 | 79 | adantr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 x. N ) e. NN0 ) |
| 104 | 103 | nn0red | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 x. N ) e. RR ) |
| 105 | 5 24 7 | sylancr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 x. n ) e. NN0 ) |
| 106 | 105 | nn0red | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 x. n ) e. RR ) |
| 107 | 1red | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 1 e. RR ) |
|
| 108 | eluzle | |- ( n e. ( ZZ>= ` N ) -> N <_ n ) |
|
| 109 | 108 | adantl | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> N <_ n ) |
| 110 | nn0re | |- ( N e. NN0 -> N e. RR ) |
|
| 111 | 110 | adantr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> N e. RR ) |
| 112 | 24 | nn0red | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> n e. RR ) |
| 113 | 3 | a1i | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 2 e. RR ) |
| 114 | 2pos | |- 0 < 2 |
|
| 115 | 114 | a1i | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 < 2 ) |
| 116 | lemul2 | |- ( ( N e. RR /\ n e. RR /\ ( 2 e. RR /\ 0 < 2 ) ) -> ( N <_ n <-> ( 2 x. N ) <_ ( 2 x. n ) ) ) |
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| 117 | 111 112 113 115 116 | syl112anc | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( N <_ n <-> ( 2 x. N ) <_ ( 2 x. n ) ) ) |
| 118 | 109 117 | mpbid | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 x. N ) <_ ( 2 x. n ) ) |
| 119 | 104 106 107 118 | leadd1dd | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 x. N ) + 1 ) <_ ( ( 2 x. n ) + 1 ) ) |
| 120 | 81 | adantr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 x. N ) + 1 ) e. NN ) |
| 121 | 120 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 x. N ) + 1 ) e. RR ) |
| 122 | 24 10 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 x. n ) + 1 ) e. NN ) |
| 123 | 122 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 x. n ) + 1 ) e. RR ) |
| 124 | 3re | |- 3 e. RR |
|
| 125 | 124 | a1i | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 3 e. RR ) |
| 126 | 3pos | |- 0 < 3 |
|
| 127 | 126 | a1i | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 < 3 ) |
| 128 | lemul2 | |- ( ( ( ( 2 x. N ) + 1 ) e. RR /\ ( ( 2 x. n ) + 1 ) e. RR /\ ( 3 e. RR /\ 0 < 3 ) ) -> ( ( ( 2 x. N ) + 1 ) <_ ( ( 2 x. n ) + 1 ) <-> ( 3 x. ( ( 2 x. N ) + 1 ) ) <_ ( 3 x. ( ( 2 x. n ) + 1 ) ) ) ) |
|
| 129 | 121 123 125 127 128 | syl112anc | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( ( 2 x. N ) + 1 ) <_ ( ( 2 x. n ) + 1 ) <-> ( 3 x. ( ( 2 x. N ) + 1 ) ) <_ ( 3 x. ( ( 2 x. n ) + 1 ) ) ) ) |
| 130 | 119 129 | mpbid | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) <_ ( 3 x. ( ( 2 x. n ) + 1 ) ) ) |
| 131 | 83 | adantr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
| 132 | 131 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 3 x. ( ( 2 x. N ) + 1 ) ) e. RR ) |
| 133 | 24 12 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 3 x. ( ( 2 x. n ) + 1 ) ) e. NN ) |
| 134 | 133 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 3 x. ( ( 2 x. n ) + 1 ) ) e. RR ) |
| 135 | 13 24 14 | sylancr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 9 ^ n ) e. NN ) |
| 136 | 135 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 9 ^ n ) e. RR ) |
| 137 | 135 | nngt0d | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 < ( 9 ^ n ) ) |
| 138 | lemul1 | |- ( ( ( 3 x. ( ( 2 x. N ) + 1 ) ) e. RR /\ ( 3 x. ( ( 2 x. n ) + 1 ) ) e. RR /\ ( ( 9 ^ n ) e. RR /\ 0 < ( 9 ^ n ) ) ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) <_ ( 3 x. ( ( 2 x. n ) + 1 ) ) <-> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) <_ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
|
| 139 | 132 134 136 137 138 | syl112anc | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) <_ ( 3 x. ( ( 2 x. n ) + 1 ) ) <-> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) <_ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 140 | 130 139 | mpbid | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) <_ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) |
| 141 | 24 99 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) e. NN ) |
| 142 | 141 | nnred | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) e. RR ) |
| 143 | 141 | nngt0d | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 < ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) |
| 144 | 24 58 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. RR ) |
| 145 | 24 59 | syldan | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> 0 < ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) |
| 146 | lediv2 | |- ( ( ( ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) e. RR /\ 0 < ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) /\ ( ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) e. RR /\ 0 < ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) /\ ( 2 e. RR /\ 0 < 2 ) ) -> ( ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) <_ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) <-> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) ) |
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| 147 | 142 143 144 145 113 115 146 | syl222anc | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) <_ ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) <-> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) ) |
| 148 | 140 147 | mpbid | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 149 | 9re | |- 9 e. RR |
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| 150 | 149 72 | rereccli | |- ( 1 / 9 ) e. RR |
| 151 | 150 | recni | |- ( 1 / 9 ) e. CC |
| 152 | 151 | a1i | |- ( N e. NN0 -> ( 1 / 9 ) e. CC ) |
| 153 | 0re | |- 0 e. RR |
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| 154 | 9pos | |- 0 < 9 |
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| 155 | 149 154 | recgt0ii | |- 0 < ( 1 / 9 ) |
| 156 | 153 150 155 | ltleii | |- 0 <_ ( 1 / 9 ) |
| 157 | absid | |- ( ( ( 1 / 9 ) e. RR /\ 0 <_ ( 1 / 9 ) ) -> ( abs ` ( 1 / 9 ) ) = ( 1 / 9 ) ) |
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| 158 | 150 156 157 | mp2an | |- ( abs ` ( 1 / 9 ) ) = ( 1 / 9 ) |
| 159 | 1lt9 | |- 1 < 9 |
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| 160 | recgt1i | |- ( ( 9 e. RR /\ 1 < 9 ) -> ( 0 < ( 1 / 9 ) /\ ( 1 / 9 ) < 1 ) ) |
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| 161 | 149 159 160 | mp2an | |- ( 0 < ( 1 / 9 ) /\ ( 1 / 9 ) < 1 ) |
| 162 | 161 | simpri | |- ( 1 / 9 ) < 1 |
| 163 | 158 162 | eqbrtri | |- ( abs ` ( 1 / 9 ) ) < 1 |
| 164 | 163 | a1i | |- ( N e. NN0 -> ( abs ` ( 1 / 9 ) ) < 1 ) |
| 165 | eqid | |- ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) = ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) |
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| 166 | ovex | |- ( ( 1 / 9 ) ^ n ) e. _V |
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| 167 | 64 165 166 | fvmpt | |- ( n e. NN0 -> ( ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ` n ) = ( ( 1 / 9 ) ^ n ) ) |
| 168 | 24 167 | syl | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ` n ) = ( ( 1 / 9 ) ^ n ) ) |
| 169 | 152 164 42 168 | geolim2 | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ) ~~> ( ( ( 1 / 9 ) ^ N ) / ( 1 - ( 1 / 9 ) ) ) ) |
| 170 | 70 | a1i | |- ( N e. NN0 -> 9 e. CC ) |
| 171 | 72 | a1i | |- ( N e. NN0 -> 9 =/= 0 ) |
| 172 | 170 171 23 | exprecd | |- ( N e. NN0 -> ( ( 1 / 9 ) ^ N ) = ( 1 / ( 9 ^ N ) ) ) |
| 173 | 70 72 | dividi | |- ( 9 / 9 ) = 1 |
| 174 | 173 | oveq1i | |- ( ( 9 / 9 ) - ( 1 / 9 ) ) = ( 1 - ( 1 / 9 ) ) |
| 175 | ax-1cn | |- 1 e. CC |
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| 176 | 70 72 | pm3.2i | |- ( 9 e. CC /\ 9 =/= 0 ) |
| 177 | divsubdir | |- ( ( 9 e. CC /\ 1 e. CC /\ ( 9 e. CC /\ 9 =/= 0 ) ) -> ( ( 9 - 1 ) / 9 ) = ( ( 9 / 9 ) - ( 1 / 9 ) ) ) |
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| 178 | 70 175 176 177 | mp3an | |- ( ( 9 - 1 ) / 9 ) = ( ( 9 / 9 ) - ( 1 / 9 ) ) |
| 179 | 9m1e8 | |- ( 9 - 1 ) = 8 |
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| 180 | 179 | oveq1i | |- ( ( 9 - 1 ) / 9 ) = ( 8 / 9 ) |
| 181 | 178 180 | eqtr3i | |- ( ( 9 / 9 ) - ( 1 / 9 ) ) = ( 8 / 9 ) |
| 182 | 174 181 | eqtr3i | |- ( 1 - ( 1 / 9 ) ) = ( 8 / 9 ) |
| 183 | 182 | a1i | |- ( N e. NN0 -> ( 1 - ( 1 / 9 ) ) = ( 8 / 9 ) ) |
| 184 | 172 183 | oveq12d | |- ( N e. NN0 -> ( ( ( 1 / 9 ) ^ N ) / ( 1 - ( 1 / 9 ) ) ) = ( ( 1 / ( 9 ^ N ) ) / ( 8 / 9 ) ) ) |
| 185 | 175 | a1i | |- ( N e. NN0 -> 1 e. CC ) |
| 186 | nnexpcl | |- ( ( 9 e. NN /\ N e. NN0 ) -> ( 9 ^ N ) e. NN ) |
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| 187 | 13 186 | mpan | |- ( N e. NN0 -> ( 9 ^ N ) e. NN ) |
| 188 | 187 | nncnd | |- ( N e. NN0 -> ( 9 ^ N ) e. CC ) |
| 189 | 8cn | |- 8 e. CC |
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| 190 | 189 70 72 | divcli | |- ( 8 / 9 ) e. CC |
| 191 | 190 | a1i | |- ( N e. NN0 -> ( 8 / 9 ) e. CC ) |
| 192 | 187 | nnne0d | |- ( N e. NN0 -> ( 9 ^ N ) =/= 0 ) |
| 193 | 8nn | |- 8 e. NN |
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| 194 | 193 | nnne0i | |- 8 =/= 0 |
| 195 | 189 70 194 72 | divne0i | |- ( 8 / 9 ) =/= 0 |
| 196 | 195 | a1i | |- ( N e. NN0 -> ( 8 / 9 ) =/= 0 ) |
| 197 | 185 188 191 192 196 | divdiv32d | |- ( N e. NN0 -> ( ( 1 / ( 9 ^ N ) ) / ( 8 / 9 ) ) = ( ( 1 / ( 8 / 9 ) ) / ( 9 ^ N ) ) ) |
| 198 | recdiv | |- ( ( ( 8 e. CC /\ 8 =/= 0 ) /\ ( 9 e. CC /\ 9 =/= 0 ) ) -> ( 1 / ( 8 / 9 ) ) = ( 9 / 8 ) ) |
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| 199 | 189 194 70 72 198 | mp4an | |- ( 1 / ( 8 / 9 ) ) = ( 9 / 8 ) |
| 200 | 199 | oveq1i | |- ( ( 1 / ( 8 / 9 ) ) / ( 9 ^ N ) ) = ( ( 9 / 8 ) / ( 9 ^ N ) ) |
| 201 | 189 | a1i | |- ( N e. NN0 -> 8 e. CC ) |
| 202 | 194 | a1i | |- ( N e. NN0 -> 8 =/= 0 ) |
| 203 | 170 201 188 202 192 | divdiv1d | |- ( N e. NN0 -> ( ( 9 / 8 ) / ( 9 ^ N ) ) = ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) |
| 204 | 200 203 | eqtrid | |- ( N e. NN0 -> ( ( 1 / ( 8 / 9 ) ) / ( 9 ^ N ) ) = ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) |
| 205 | 184 197 204 | 3eqtrd | |- ( N e. NN0 -> ( ( ( 1 / 9 ) ^ N ) / ( 1 - ( 1 / 9 ) ) ) = ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) |
| 206 | 169 205 | breqtrd | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ) ~~> ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) |
| 207 | expcl | |- ( ( ( 1 / 9 ) e. CC /\ n e. NN0 ) -> ( ( 1 / 9 ) ^ n ) e. CC ) |
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| 208 | 151 24 207 | sylancr | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 1 / 9 ) ^ n ) e. CC ) |
| 209 | 168 208 | eqeltrd | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ` n ) e. CC ) |
| 210 | 24 68 | syl | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) ) |
| 211 | 168 | oveq2d | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ` n ) ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ n ) ) ) |
| 212 | 210 211 | eqtr4d | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ` n ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( k e. NN0 |-> ( ( 1 / 9 ) ^ k ) ) ` n ) ) ) |
| 213 | 22 23 86 206 209 212 | isermulc2 | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) ~~> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) ) |
| 214 | seqex | |- seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) e. _V |
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| 215 | ovex | |- ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) e. _V |
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| 216 | 214 215 | breldm | |- ( seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) ~~> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) -> seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) e. dom ~~> ) |
| 217 | 213 216 | syl | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) e. dom ~~> ) |
| 218 | 22 23 34 35 98 102 148 46 217 | isumle | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) ) |
| 219 | 102 | recnd | |- ( ( N e. NN0 /\ n e. ( ZZ>= ` N ) ) -> ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) e. CC ) |
| 220 | 3cn | |- 3 e. CC |
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| 221 | 4cn | |- 4 e. CC |
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| 222 | 2cn | |- 2 e. CC |
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| 223 | 4ne0 | |- 4 =/= 0 |
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| 224 | 3ne0 | |- 3 =/= 0 |
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| 225 | 2ne0 | |- 2 =/= 0 |
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| 226 | 220 221 222 220 223 224 225 | divdivdivi | |- ( ( 3 / 4 ) / ( 2 / 3 ) ) = ( ( 3 x. 3 ) / ( 4 x. 2 ) ) |
| 227 | 3t3e9 | |- ( 3 x. 3 ) = 9 |
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| 228 | 4t2e8 | |- ( 4 x. 2 ) = 8 |
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| 229 | 227 228 | oveq12i | |- ( ( 3 x. 3 ) / ( 4 x. 2 ) ) = ( 9 / 8 ) |
| 230 | 226 229 | eqtri | |- ( ( 3 / 4 ) / ( 2 / 3 ) ) = ( 9 / 8 ) |
| 231 | 230 | oveq2i | |- ( ( 2 / 3 ) x. ( ( 3 / 4 ) / ( 2 / 3 ) ) ) = ( ( 2 / 3 ) x. ( 9 / 8 ) ) |
| 232 | 220 221 223 | divcli | |- ( 3 / 4 ) e. CC |
| 233 | 222 220 224 | divcli | |- ( 2 / 3 ) e. CC |
| 234 | 222 220 225 224 | divne0i | |- ( 2 / 3 ) =/= 0 |
| 235 | 232 233 234 | divcan2i | |- ( ( 2 / 3 ) x. ( ( 3 / 4 ) / ( 2 / 3 ) ) ) = ( 3 / 4 ) |
| 236 | 231 235 | eqtr3i | |- ( ( 2 / 3 ) x. ( 9 / 8 ) ) = ( 3 / 4 ) |
| 237 | 236 | oveq1i | |- ( ( ( 2 / 3 ) x. ( 9 / 8 ) ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) = ( ( 3 / 4 ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) |
| 238 | 2cnd | |- ( N e. NN0 -> 2 e. CC ) |
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| 239 | 220 | a1i | |- ( N e. NN0 -> 3 e. CC ) |
| 240 | 81 | nncnd | |- ( N e. NN0 -> ( ( 2 x. N ) + 1 ) e. CC ) |
| 241 | 224 | a1i | |- ( N e. NN0 -> 3 =/= 0 ) |
| 242 | 81 | nnne0d | |- ( N e. NN0 -> ( ( 2 x. N ) + 1 ) =/= 0 ) |
| 243 | 238 239 240 241 242 | divdiv1d | |- ( N e. NN0 -> ( ( 2 / 3 ) / ( ( 2 x. N ) + 1 ) ) = ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) ) |
| 244 | 243 203 | oveq12d | |- ( N e. NN0 -> ( ( ( 2 / 3 ) / ( ( 2 x. N ) + 1 ) ) x. ( ( 9 / 8 ) / ( 9 ^ N ) ) ) = ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) ) |
| 245 | 233 | a1i | |- ( N e. NN0 -> ( 2 / 3 ) e. CC ) |
| 246 | 70 189 194 | divcli | |- ( 9 / 8 ) e. CC |
| 247 | 246 | a1i | |- ( N e. NN0 -> ( 9 / 8 ) e. CC ) |
| 248 | 245 240 247 188 242 192 | divmuldivd | |- ( N e. NN0 -> ( ( ( 2 / 3 ) / ( ( 2 x. N ) + 1 ) ) x. ( ( 9 / 8 ) / ( 9 ^ N ) ) ) = ( ( ( 2 / 3 ) x. ( 9 / 8 ) ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) |
| 249 | 244 248 | eqtr3d | |- ( N e. NN0 -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) = ( ( ( 2 / 3 ) x. ( 9 / 8 ) ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) |
| 250 | 221 | a1i | |- ( N e. NN0 -> 4 e. CC ) |
| 251 | 250 240 188 | mulassd | |- ( N e. NN0 -> ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) = ( 4 x. ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) |
| 252 | 251 | oveq2d | |- ( N e. NN0 -> ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) = ( 3 / ( 4 x. ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) ) |
| 253 | 81 187 | nnmulcld | |- ( N e. NN0 -> ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) e. NN ) |
| 254 | 253 | nncnd | |- ( N e. NN0 -> ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) e. CC ) |
| 255 | 223 | a1i | |- ( N e. NN0 -> 4 =/= 0 ) |
| 256 | 253 | nnne0d | |- ( N e. NN0 -> ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) =/= 0 ) |
| 257 | 239 250 254 255 256 | divdiv1d | |- ( N e. NN0 -> ( ( 3 / 4 ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) = ( 3 / ( 4 x. ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) ) |
| 258 | 252 257 | eqtr4d | |- ( N e. NN0 -> ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) = ( ( 3 / 4 ) / ( ( ( 2 x. N ) + 1 ) x. ( 9 ^ N ) ) ) ) |
| 259 | 237 249 258 | 3eqtr4a | |- ( N e. NN0 -> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( 9 / ( 8 x. ( 9 ^ N ) ) ) ) = ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) |
| 260 | 213 259 | breqtrd | |- ( N e. NN0 -> seq N ( + , ( k e. NN0 |-> ( ( 2 / ( 3 x. ( ( 2 x. N ) + 1 ) ) ) x. ( ( 1 / 9 ) ^ k ) ) ) ) ~~> ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) |
| 261 | 22 23 98 219 260 | isumclim | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ n ) ) ) = ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) |
| 262 | 218 261 | breqtrd | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) |
| 263 | 4nn | |- 4 e. NN |
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| 264 | nnmulcl | |- ( ( 4 e. NN /\ ( ( 2 x. N ) + 1 ) e. NN ) -> ( 4 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
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| 265 | 263 81 264 | sylancr | |- ( N e. NN0 -> ( 4 x. ( ( 2 x. N ) + 1 ) ) e. NN ) |
| 266 | 265 187 | nnmulcld | |- ( N e. NN0 -> ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) e. NN ) |
| 267 | nndivre | |- ( ( 3 e. RR /\ ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) e. NN ) -> ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) e. RR ) |
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| 268 | 124 266 267 | sylancr | |- ( N e. NN0 -> ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) e. RR ) |
| 269 | elicc2 | |- ( ( 0 e. RR /\ ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) e. RR ) -> ( sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. ( 0 [,] ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) <-> ( sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR /\ 0 <_ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) /\ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) ) ) |
|
| 270 | 153 268 269 | sylancr | |- ( N e. NN0 -> ( sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. ( 0 [,] ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) <-> ( sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. RR /\ 0 <_ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) /\ sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) <_ ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) ) ) |
| 271 | 47 63 262 270 | mpbir3and | |- ( N e. NN0 -> sum_ n e. ( ZZ>= ` N ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) e. ( 0 [,] ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) ) |
| 272 | 54 271 | eqeltrd | |- ( N e. NN0 -> ( ( log ` 2 ) - sum_ n e. ( 0 ... ( N - 1 ) ) ( 2 / ( ( 3 x. ( ( 2 x. n ) + 1 ) ) x. ( 9 ^ n ) ) ) ) e. ( 0 [,] ( 3 / ( ( 4 x. ( ( 2 x. N ) + 1 ) ) x. ( 9 ^ N ) ) ) ) ) |