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Description: A bound for any B(N)-B(N + 1) that will allow to find a lower bound for the whole B sequence. (Contributed by Glauco Siliprandi, 29-Jun-2017)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | stirlinglem10.1 | |- A = ( n e. NN |-> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
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| stirlinglem10.2 | |- B = ( n e. NN |-> ( log ` ( A ` n ) ) ) |
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| stirlinglem10.4 | |- K = ( k e. NN |-> ( ( 1 / ( ( 2 x. k ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. k ) ) ) ) |
||
| stirlinglem10.5 | |- L = ( k e. NN |-> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ k ) ) |
||
| Assertion | stirlinglem10 | |- ( N e. NN -> ( ( B ` N ) - ( B ` ( N + 1 ) ) ) <_ ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | stirlinglem10.1 | |- A = ( n e. NN |-> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
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| 2 | stirlinglem10.2 | |- B = ( n e. NN |-> ( log ` ( A ` n ) ) ) |
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| 3 | stirlinglem10.4 | |- K = ( k e. NN |-> ( ( 1 / ( ( 2 x. k ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. k ) ) ) ) |
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| 4 | stirlinglem10.5 | |- L = ( k e. NN |-> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ k ) ) |
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| 5 | nnuz | |- NN = ( ZZ>= ` 1 ) |
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| 6 | 1zzd | |- ( N e. NN -> 1 e. ZZ ) |
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| 7 | eqid | |- ( n e. NN |-> ( ( ( ( 1 + ( 2 x. n ) ) / 2 ) x. ( log ` ( ( n + 1 ) / n ) ) ) - 1 ) ) = ( n e. NN |-> ( ( ( ( 1 + ( 2 x. n ) ) / 2 ) x. ( log ` ( ( n + 1 ) / n ) ) ) - 1 ) ) |
|
| 8 | 1 2 7 3 | stirlinglem9 | |- ( N e. NN -> seq 1 ( + , K ) ~~> ( ( B ` N ) - ( B ` ( N + 1 ) ) ) ) |
| 9 | 2cnd | |- ( N e. NN -> 2 e. CC ) |
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| 10 | nncn | |- ( N e. NN -> N e. CC ) |
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| 11 | 9 10 | mulcld | |- ( N e. NN -> ( 2 x. N ) e. CC ) |
| 12 | 1cnd | |- ( N e. NN -> 1 e. CC ) |
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| 13 | 11 12 | addcld | |- ( N e. NN -> ( ( 2 x. N ) + 1 ) e. CC ) |
| 14 | 13 | sqcld | |- ( N e. NN -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. CC ) |
| 15 | 0red | |- ( N e. NN -> 0 e. RR ) |
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| 16 | 1red | |- ( N e. NN -> 1 e. RR ) |
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| 17 | 2re | |- 2 e. RR |
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| 18 | 17 | a1i | |- ( N e. NN -> 2 e. RR ) |
| 19 | nnre | |- ( N e. NN -> N e. RR ) |
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| 20 | 18 19 | remulcld | |- ( N e. NN -> ( 2 x. N ) e. RR ) |
| 21 | 20 16 | readdcld | |- ( N e. NN -> ( ( 2 x. N ) + 1 ) e. RR ) |
| 22 | 0lt1 | |- 0 < 1 |
|
| 23 | 22 | a1i | |- ( N e. NN -> 0 < 1 ) |
| 24 | 2rp | |- 2 e. RR+ |
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| 25 | 24 | a1i | |- ( N e. NN -> 2 e. RR+ ) |
| 26 | nnrp | |- ( N e. NN -> N e. RR+ ) |
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| 27 | 25 26 | rpmulcld | |- ( N e. NN -> ( 2 x. N ) e. RR+ ) |
| 28 | 16 27 | ltaddrp2d | |- ( N e. NN -> 1 < ( ( 2 x. N ) + 1 ) ) |
| 29 | 15 16 21 23 28 | lttrd | |- ( N e. NN -> 0 < ( ( 2 x. N ) + 1 ) ) |
| 30 | 29 | gt0ne0d | |- ( N e. NN -> ( ( 2 x. N ) + 1 ) =/= 0 ) |
| 31 | 2z | |- 2 e. ZZ |
|
| 32 | 31 | a1i | |- ( N e. NN -> 2 e. ZZ ) |
| 33 | 13 30 32 | expne0d | |- ( N e. NN -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) =/= 0 ) |
| 34 | 14 33 | reccld | |- ( N e. NN -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. CC ) |
| 35 | 16 | renegcld | |- ( N e. NN -> -u 1 e. RR ) |
| 36 | 21 | resqcld | |- ( N e. NN -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. RR ) |
| 37 | 36 33 | rereccld | |- ( N e. NN -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. RR ) |
| 38 | 1re | |- 1 e. RR |
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| 39 | lt0neg2 | |- ( 1 e. RR -> ( 0 < 1 <-> -u 1 < 0 ) ) |
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| 40 | 38 39 | ax-mp | |- ( 0 < 1 <-> -u 1 < 0 ) |
| 41 | 23 40 | sylib | |- ( N e. NN -> -u 1 < 0 ) |
| 42 | 21 30 | sqgt0d | |- ( N e. NN -> 0 < ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) |
| 43 | 36 42 | recgt0d | |- ( N e. NN -> 0 < ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 44 | 35 15 37 41 43 | lttrd | |- ( N e. NN -> -u 1 < ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 45 | 2nn | |- 2 e. NN |
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| 46 | 45 | a1i | |- ( N e. NN -> 2 e. NN ) |
| 47 | expgt1 | |- ( ( ( ( 2 x. N ) + 1 ) e. RR /\ 2 e. NN /\ 1 < ( ( 2 x. N ) + 1 ) ) -> 1 < ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) |
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| 48 | 21 46 28 47 | syl3anc | |- ( N e. NN -> 1 < ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) |
| 49 | 36 42 | elrpd | |- ( N e. NN -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. RR+ ) |
| 50 | 49 | recgt1d | |- ( N e. NN -> ( 1 < ( ( ( 2 x. N ) + 1 ) ^ 2 ) <-> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) < 1 ) ) |
| 51 | 48 50 | mpbid | |- ( N e. NN -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) < 1 ) |
| 52 | 37 16 | absltd | |- ( N e. NN -> ( ( abs ` ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) < 1 <-> ( -u 1 < ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) /\ ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) < 1 ) ) ) |
| 53 | 44 51 52 | mpbir2and | |- ( N e. NN -> ( abs ` ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) < 1 ) |
| 54 | 1nn0 | |- 1 e. NN0 |
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| 55 | 54 | a1i | |- ( N e. NN -> 1 e. NN0 ) |
| 56 | 4 | a1i | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> L = ( k e. NN |-> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ k ) ) ) |
| 57 | simpr | |- ( ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) /\ k = j ) -> k = j ) |
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| 58 | 57 | oveq2d | |- ( ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) /\ k = j ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ k ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ j ) ) |
| 59 | elnnuz | |- ( j e. NN <-> j e. ( ZZ>= ` 1 ) ) |
|
| 60 | 59 | biimpri | |- ( j e. ( ZZ>= ` 1 ) -> j e. NN ) |
| 61 | 60 | adantl | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> j e. NN ) |
| 62 | 34 | adantr | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. CC ) |
| 63 | 61 | nnnn0d | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> j e. NN0 ) |
| 64 | 62 63 | expcld | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ j ) e. CC ) |
| 65 | 56 58 61 64 | fvmptd | |- ( ( N e. NN /\ j e. ( ZZ>= ` 1 ) ) -> ( L ` j ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ j ) ) |
| 66 | 34 53 55 65 | geolim2 | |- ( N e. NN -> seq 1 ( + , L ) ~~> ( ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ 1 ) / ( 1 - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) ) |
| 67 | 34 | exp1d | |- ( N e. NN -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ 1 ) = ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 68 | 14 33 | dividd | |- ( N e. NN -> ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) = 1 ) |
| 69 | 68 | eqcomd | |- ( N e. NN -> 1 = ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 70 | 69 | oveq1d | |- ( N e. NN -> ( 1 - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) = ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) |
| 71 | 49 | rpcnne0d | |- ( N e. NN -> ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. CC /\ ( ( ( 2 x. N ) + 1 ) ^ 2 ) =/= 0 ) ) |
| 72 | divsubdir | |- ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. CC /\ 1 e. CC /\ ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. CC /\ ( ( ( 2 x. N ) + 1 ) ^ 2 ) =/= 0 ) ) -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) - 1 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) = ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) |
|
| 73 | 14 12 71 72 | syl3anc | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) - 1 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) = ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) |
| 74 | ax-1cn | |- 1 e. CC |
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| 75 | binom2 | |- ( ( ( 2 x. N ) e. CC /\ 1 e. CC ) -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) = ( ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) + ( 1 ^ 2 ) ) ) |
|
| 76 | 11 74 75 | sylancl | |- ( N e. NN -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) = ( ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) + ( 1 ^ 2 ) ) ) |
| 77 | 76 | oveq1d | |- ( N e. NN -> ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) - 1 ) = ( ( ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) + ( 1 ^ 2 ) ) - 1 ) ) |
| 78 | 9 10 | sqmuld | |- ( N e. NN -> ( ( 2 x. N ) ^ 2 ) = ( ( 2 ^ 2 ) x. ( N ^ 2 ) ) ) |
| 79 | sq2 | |- ( 2 ^ 2 ) = 4 |
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| 80 | 79 | a1i | |- ( N e. NN -> ( 2 ^ 2 ) = 4 ) |
| 81 | 80 | oveq1d | |- ( N e. NN -> ( ( 2 ^ 2 ) x. ( N ^ 2 ) ) = ( 4 x. ( N ^ 2 ) ) ) |
| 82 | 78 81 | eqtrd | |- ( N e. NN -> ( ( 2 x. N ) ^ 2 ) = ( 4 x. ( N ^ 2 ) ) ) |
| 83 | 11 | mulridd | |- ( N e. NN -> ( ( 2 x. N ) x. 1 ) = ( 2 x. N ) ) |
| 84 | 83 | oveq2d | |- ( N e. NN -> ( 2 x. ( ( 2 x. N ) x. 1 ) ) = ( 2 x. ( 2 x. N ) ) ) |
| 85 | 9 9 10 | mulassd | |- ( N e. NN -> ( ( 2 x. 2 ) x. N ) = ( 2 x. ( 2 x. N ) ) ) |
| 86 | 2t2e4 | |- ( 2 x. 2 ) = 4 |
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| 87 | 86 | a1i | |- ( N e. NN -> ( 2 x. 2 ) = 4 ) |
| 88 | 87 | oveq1d | |- ( N e. NN -> ( ( 2 x. 2 ) x. N ) = ( 4 x. N ) ) |
| 89 | 84 85 88 | 3eqtr2d | |- ( N e. NN -> ( 2 x. ( ( 2 x. N ) x. 1 ) ) = ( 4 x. N ) ) |
| 90 | 82 89 | oveq12d | |- ( N e. NN -> ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) = ( ( 4 x. ( N ^ 2 ) ) + ( 4 x. N ) ) ) |
| 91 | 4cn | |- 4 e. CC |
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| 92 | 91 | a1i | |- ( N e. NN -> 4 e. CC ) |
| 93 | 10 | sqcld | |- ( N e. NN -> ( N ^ 2 ) e. CC ) |
| 94 | 92 93 10 | adddid | |- ( N e. NN -> ( 4 x. ( ( N ^ 2 ) + N ) ) = ( ( 4 x. ( N ^ 2 ) ) + ( 4 x. N ) ) ) |
| 95 | 10 | sqvald | |- ( N e. NN -> ( N ^ 2 ) = ( N x. N ) ) |
| 96 | 10 | mulridd | |- ( N e. NN -> ( N x. 1 ) = N ) |
| 97 | 96 | eqcomd | |- ( N e. NN -> N = ( N x. 1 ) ) |
| 98 | 95 97 | oveq12d | |- ( N e. NN -> ( ( N ^ 2 ) + N ) = ( ( N x. N ) + ( N x. 1 ) ) ) |
| 99 | 10 10 12 | adddid | |- ( N e. NN -> ( N x. ( N + 1 ) ) = ( ( N x. N ) + ( N x. 1 ) ) ) |
| 100 | 98 99 | eqtr4d | |- ( N e. NN -> ( ( N ^ 2 ) + N ) = ( N x. ( N + 1 ) ) ) |
| 101 | 100 | oveq2d | |- ( N e. NN -> ( 4 x. ( ( N ^ 2 ) + N ) ) = ( 4 x. ( N x. ( N + 1 ) ) ) ) |
| 102 | 90 94 101 | 3eqtr2d | |- ( N e. NN -> ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) = ( 4 x. ( N x. ( N + 1 ) ) ) ) |
| 103 | sq1 | |- ( 1 ^ 2 ) = 1 |
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| 104 | 103 | a1i | |- ( N e. NN -> ( 1 ^ 2 ) = 1 ) |
| 105 | 102 104 | oveq12d | |- ( N e. NN -> ( ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) + ( 1 ^ 2 ) ) = ( ( 4 x. ( N x. ( N + 1 ) ) ) + 1 ) ) |
| 106 | 105 | oveq1d | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) ^ 2 ) + ( 2 x. ( ( 2 x. N ) x. 1 ) ) ) + ( 1 ^ 2 ) ) - 1 ) = ( ( ( 4 x. ( N x. ( N + 1 ) ) ) + 1 ) - 1 ) ) |
| 107 | 10 12 | addcld | |- ( N e. NN -> ( N + 1 ) e. CC ) |
| 108 | 10 107 | mulcld | |- ( N e. NN -> ( N x. ( N + 1 ) ) e. CC ) |
| 109 | 92 108 | mulcld | |- ( N e. NN -> ( 4 x. ( N x. ( N + 1 ) ) ) e. CC ) |
| 110 | 109 12 | pncand | |- ( N e. NN -> ( ( ( 4 x. ( N x. ( N + 1 ) ) ) + 1 ) - 1 ) = ( 4 x. ( N x. ( N + 1 ) ) ) ) |
| 111 | 77 106 110 | 3eqtrd | |- ( N e. NN -> ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) - 1 ) = ( 4 x. ( N x. ( N + 1 ) ) ) ) |
| 112 | 111 | oveq1d | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) - 1 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) = ( ( 4 x. ( N x. ( N + 1 ) ) ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 113 | 70 73 112 | 3eqtr2d | |- ( N e. NN -> ( 1 - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) = ( ( 4 x. ( N x. ( N + 1 ) ) ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) |
| 114 | 67 113 | oveq12d | |- ( N e. NN -> ( ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ 1 ) / ( 1 - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) / ( ( 4 x. ( N x. ( N + 1 ) ) ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) |
| 115 | 4pos | |- 0 < 4 |
|
| 116 | 115 | a1i | |- ( N e. NN -> 0 < 4 ) |
| 117 | 116 | gt0ne0d | |- ( N e. NN -> 4 =/= 0 ) |
| 118 | nnne0 | |- ( N e. NN -> N =/= 0 ) |
|
| 119 | 19 16 | readdcld | |- ( N e. NN -> ( N + 1 ) e. RR ) |
| 120 | nngt0 | |- ( N e. NN -> 0 < N ) |
|
| 121 | 19 | ltp1d | |- ( N e. NN -> N < ( N + 1 ) ) |
| 122 | 15 19 119 120 121 | lttrd | |- ( N e. NN -> 0 < ( N + 1 ) ) |
| 123 | 122 | gt0ne0d | |- ( N e. NN -> ( N + 1 ) =/= 0 ) |
| 124 | 10 107 118 123 | mulne0d | |- ( N e. NN -> ( N x. ( N + 1 ) ) =/= 0 ) |
| 125 | 92 108 117 124 | mulne0d | |- ( N e. NN -> ( 4 x. ( N x. ( N + 1 ) ) ) =/= 0 ) |
| 126 | 12 14 109 14 33 33 125 | divdivdivd | |- ( N e. NN -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) / ( ( 4 x. ( N x. ( N + 1 ) ) ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) = ( ( 1 x. ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. ( 4 x. ( N x. ( N + 1 ) ) ) ) ) ) |
| 127 | 12 14 | mulcomd | |- ( N e. NN -> ( 1 x. ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) = ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. 1 ) ) |
| 128 | 127 | oveq1d | |- ( N e. NN -> ( ( 1 x. ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. ( 4 x. ( N x. ( N + 1 ) ) ) ) ) = ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. 1 ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. ( 4 x. ( N x. ( N + 1 ) ) ) ) ) ) |
| 129 | 12 | mulridd | |- ( N e. NN -> ( 1 x. 1 ) = 1 ) |
| 130 | 129 | eqcomd | |- ( N e. NN -> 1 = ( 1 x. 1 ) ) |
| 131 | 130 | oveq1d | |- ( N e. NN -> ( 1 / ( 4 x. ( N x. ( N + 1 ) ) ) ) = ( ( 1 x. 1 ) / ( 4 x. ( N x. ( N + 1 ) ) ) ) ) |
| 132 | 12 92 12 108 117 124 | divmuldivd | |- ( N e. NN -> ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) = ( ( 1 x. 1 ) / ( 4 x. ( N x. ( N + 1 ) ) ) ) ) |
| 133 | 131 132 | eqtr4d | |- ( N e. NN -> ( 1 / ( 4 x. ( N x. ( N + 1 ) ) ) ) = ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 134 | 68 133 | oveq12d | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) x. ( 1 / ( 4 x. ( N x. ( N + 1 ) ) ) ) ) = ( 1 x. ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) ) |
| 135 | 14 14 12 109 33 125 | divmuldivd | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) x. ( 1 / ( 4 x. ( N x. ( N + 1 ) ) ) ) ) = ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. 1 ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. ( 4 x. ( N x. ( N + 1 ) ) ) ) ) ) |
| 136 | 92 117 | reccld | |- ( N e. NN -> ( 1 / 4 ) e. CC ) |
| 137 | 108 124 | reccld | |- ( N e. NN -> ( 1 / ( N x. ( N + 1 ) ) ) e. CC ) |
| 138 | 136 137 | mulcld | |- ( N e. NN -> ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) e. CC ) |
| 139 | 138 | mullidd | |- ( N e. NN -> ( 1 x. ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) = ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 140 | 134 135 139 | 3eqtr3d | |- ( N e. NN -> ( ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. 1 ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) x. ( 4 x. ( N x. ( N + 1 ) ) ) ) ) = ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 141 | 126 128 140 | 3eqtrd | |- ( N e. NN -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) / ( ( 4 x. ( N x. ( N + 1 ) ) ) / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) = ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 142 | 114 141 | eqtrd | |- ( N e. NN -> ( ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ 1 ) / ( 1 - ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ) ) = ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 143 | 66 142 | breqtrd | |- ( N e. NN -> seq 1 ( + , L ) ~~> ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |
| 144 | 59 | biimpi | |- ( j e. NN -> j e. ( ZZ>= ` 1 ) ) |
| 145 | 144 | adantl | |- ( ( N e. NN /\ j e. NN ) -> j e. ( ZZ>= ` 1 ) ) |
| 146 | oveq2 | |- ( k = n -> ( 2 x. k ) = ( 2 x. n ) ) |
|
| 147 | 146 | oveq1d | |- ( k = n -> ( ( 2 x. k ) + 1 ) = ( ( 2 x. n ) + 1 ) ) |
| 148 | 147 | oveq2d | |- ( k = n -> ( 1 / ( ( 2 x. k ) + 1 ) ) = ( 1 / ( ( 2 x. n ) + 1 ) ) ) |
| 149 | 146 | oveq2d | |- ( k = n -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. k ) ) = ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) |
| 150 | 148 149 | oveq12d | |- ( k = n -> ( ( 1 / ( ( 2 x. k ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. k ) ) ) = ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) ) |
| 151 | elfznn | |- ( n e. ( 1 ... j ) -> n e. NN ) |
|
| 152 | 151 | adantl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> n e. NN ) |
| 153 | 2cnd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 2 e. CC ) |
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| 154 | 152 | nncnd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> n e. CC ) |
| 155 | 153 154 | mulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 2 x. n ) e. CC ) |
| 156 | 1cnd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 1 e. CC ) |
|
| 157 | 155 156 | addcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. n ) + 1 ) e. CC ) |
| 158 | 0red | |- ( n e. NN -> 0 e. RR ) |
|
| 159 | 1red | |- ( n e. NN -> 1 e. RR ) |
|
| 160 | 17 | a1i | |- ( n e. NN -> 2 e. RR ) |
| 161 | nnre | |- ( n e. NN -> n e. RR ) |
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| 162 | 160 161 | remulcld | |- ( n e. NN -> ( 2 x. n ) e. RR ) |
| 163 | 162 159 | readdcld | |- ( n e. NN -> ( ( 2 x. n ) + 1 ) e. RR ) |
| 164 | 22 | a1i | |- ( n e. NN -> 0 < 1 ) |
| 165 | 24 | a1i | |- ( n e. NN -> 2 e. RR+ ) |
| 166 | nnrp | |- ( n e. NN -> n e. RR+ ) |
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| 167 | 165 166 | rpmulcld | |- ( n e. NN -> ( 2 x. n ) e. RR+ ) |
| 168 | 159 167 | ltaddrp2d | |- ( n e. NN -> 1 < ( ( 2 x. n ) + 1 ) ) |
| 169 | 158 159 163 164 168 | lttrd | |- ( n e. NN -> 0 < ( ( 2 x. n ) + 1 ) ) |
| 170 | 151 169 | syl | |- ( n e. ( 1 ... j ) -> 0 < ( ( 2 x. n ) + 1 ) ) |
| 171 | 170 | gt0ne0d | |- ( n e. ( 1 ... j ) -> ( ( 2 x. n ) + 1 ) =/= 0 ) |
| 172 | 171 | adantl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. n ) + 1 ) =/= 0 ) |
| 173 | 157 172 | reccld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) e. CC ) |
| 174 | 10 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> N e. CC ) |
| 175 | 153 174 | mulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 2 x. N ) e. CC ) |
| 176 | 175 156 | addcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. N ) + 1 ) e. CC ) |
| 177 | 30 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. N ) + 1 ) =/= 0 ) |
| 178 | 176 177 | reccld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. N ) + 1 ) ) e. CC ) |
| 179 | 2nn0 | |- 2 e. NN0 |
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| 180 | 179 | a1i | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 2 e. NN0 ) |
| 181 | 152 | nnnn0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> n e. NN0 ) |
| 182 | 180 181 | nn0mulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 2 x. n ) e. NN0 ) |
| 183 | 178 182 | expcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) e. CC ) |
| 184 | 173 183 | mulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) e. CC ) |
| 185 | 3 150 152 184 | fvmptd3 | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( K ` n ) = ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) ) |
| 186 | 185 | adantlr | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( K ` n ) = ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) ) |
| 187 | 169 | gt0ne0d | |- ( n e. NN -> ( ( 2 x. n ) + 1 ) =/= 0 ) |
| 188 | 163 187 | rereccld | |- ( n e. NN -> ( 1 / ( ( 2 x. n ) + 1 ) ) e. RR ) |
| 189 | 151 188 | syl | |- ( n e. ( 1 ... j ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) e. RR ) |
| 190 | 189 | adantl | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) e. RR ) |
| 191 | 21 30 | rereccld | |- ( N e. NN -> ( 1 / ( ( 2 x. N ) + 1 ) ) e. RR ) |
| 192 | 191 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. N ) + 1 ) ) e. RR ) |
| 193 | 192 182 | reexpcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) e. RR ) |
| 194 | 193 | adantlr | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) e. RR ) |
| 195 | 190 194 | remulcld | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) e. RR ) |
| 196 | 186 195 | eqeltrd | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( K ` n ) e. RR ) |
| 197 | readdcl | |- ( ( n e. RR /\ i e. RR ) -> ( n + i ) e. RR ) |
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| 198 | 197 | adantl | |- ( ( ( N e. NN /\ j e. NN ) /\ ( n e. RR /\ i e. RR ) ) -> ( n + i ) e. RR ) |
| 199 | 145 196 198 | seqcl | |- ( ( N e. NN /\ j e. NN ) -> ( seq 1 ( + , K ) ` j ) e. RR ) |
| 200 | oveq2 | |- ( k = n -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ k ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
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| 201 | 34 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. CC ) |
| 202 | 201 181 | expcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) e. CC ) |
| 203 | 4 200 152 202 | fvmptd3 | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( L ` n ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
| 204 | 37 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. RR ) |
| 205 | 204 181 | reexpcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) e. RR ) |
| 206 | 203 205 | eqeltrd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( L ` n ) e. RR ) |
| 207 | 206 | adantlr | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( L ` n ) e. RR ) |
| 208 | 145 207 198 | seqcl | |- ( ( N e. NN /\ j e. NN ) -> ( seq 1 ( + , L ) ` j ) e. RR ) |
| 209 | 31 | a1i | |- ( n e. ( 1 ... j ) -> 2 e. ZZ ) |
| 210 | elfzelz | |- ( n e. ( 1 ... j ) -> n e. ZZ ) |
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| 211 | 209 210 | zmulcld | |- ( n e. ( 1 ... j ) -> ( 2 x. n ) e. ZZ ) |
| 212 | 1exp | |- ( ( 2 x. n ) e. ZZ -> ( 1 ^ ( 2 x. n ) ) = 1 ) |
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| 213 | 211 212 | syl | |- ( n e. ( 1 ... j ) -> ( 1 ^ ( 2 x. n ) ) = 1 ) |
| 214 | 1exp | |- ( n e. ZZ -> ( 1 ^ n ) = 1 ) |
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| 215 | 210 214 | syl | |- ( n e. ( 1 ... j ) -> ( 1 ^ n ) = 1 ) |
| 216 | 213 215 | eqtr4d | |- ( n e. ( 1 ... j ) -> ( 1 ^ ( 2 x. n ) ) = ( 1 ^ n ) ) |
| 217 | 216 | adantl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 ^ ( 2 x. n ) ) = ( 1 ^ n ) ) |
| 218 | 176 181 180 | expmuld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( ( 2 x. N ) + 1 ) ^ ( 2 x. n ) ) = ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) ^ n ) ) |
| 219 | 217 218 | oveq12d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 ^ ( 2 x. n ) ) / ( ( ( 2 x. N ) + 1 ) ^ ( 2 x. n ) ) ) = ( ( 1 ^ n ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) ^ n ) ) ) |
| 220 | 156 176 177 182 | expdivd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) = ( ( 1 ^ ( 2 x. n ) ) / ( ( ( 2 x. N ) + 1 ) ^ ( 2 x. n ) ) ) ) |
| 221 | 176 | sqcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. CC ) |
| 222 | 31 | a1i | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 2 e. ZZ ) |
| 223 | 176 177 222 | expne0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) =/= 0 ) |
| 224 | 156 221 223 181 | expdivd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) = ( ( 1 ^ n ) / ( ( ( ( 2 x. N ) + 1 ) ^ 2 ) ^ n ) ) ) |
| 225 | 219 220 224 | 3eqtr4d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
| 226 | 225 | oveq2d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) = ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) ) |
| 227 | 1rp | |- 1 e. RR+ |
|
| 228 | 227 | a1i | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 1 e. RR+ ) |
| 229 | 17 | a1i | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 2 e. RR ) |
| 230 | 152 | nnred | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> n e. RR ) |
| 231 | 229 230 | remulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 2 x. n ) e. RR ) |
| 232 | 180 | nn0ge0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ 2 ) |
| 233 | 181 | nn0ge0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ n ) |
| 234 | 229 230 232 233 | mulge0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ ( 2 x. n ) ) |
| 235 | 231 234 | ge0p1rpd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. n ) + 1 ) e. RR+ ) |
| 236 | 1red | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 1 e. RR ) |
|
| 237 | 228 | rpge0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ 1 ) |
| 238 | 159 163 168 | ltled | |- ( n e. NN -> 1 <_ ( ( 2 x. n ) + 1 ) ) |
| 239 | 151 238 | syl | |- ( n e. ( 1 ... j ) -> 1 <_ ( ( 2 x. n ) + 1 ) ) |
| 240 | 239 | adantl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 1 <_ ( ( 2 x. n ) + 1 ) ) |
| 241 | 228 235 236 237 240 | lediv2ad | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) <_ ( 1 / 1 ) ) |
| 242 | 156 | div1d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / 1 ) = 1 ) |
| 243 | 241 242 | breqtrd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) <_ 1 ) |
| 244 | 152 188 | syl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( 2 x. n ) + 1 ) ) e. RR ) |
| 245 | 19 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> N e. RR ) |
| 246 | 229 245 | remulcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 2 x. N ) e. RR ) |
| 247 | 15 19 120 | ltled | |- ( N e. NN -> 0 <_ N ) |
| 248 | 247 | adantr | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ N ) |
| 249 | 229 245 232 248 | mulge0d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> 0 <_ ( 2 x. N ) ) |
| 250 | 246 249 | ge0p1rpd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 2 x. N ) + 1 ) e. RR+ ) |
| 251 | 250 222 | rpexpcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( ( 2 x. N ) + 1 ) ^ 2 ) e. RR+ ) |
| 252 | 251 | rpreccld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) e. RR+ ) |
| 253 | 210 | adantl | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> n e. ZZ ) |
| 254 | 252 253 | rpexpcld | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) e. RR+ ) |
| 255 | 244 236 254 | lemul1d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) <_ 1 <-> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) <_ ( 1 x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) ) ) |
| 256 | 243 255 | mpbid | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) <_ ( 1 x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) ) |
| 257 | 202 | mullidd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( 1 x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) = ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
| 258 | 256 257 | breqtrd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) <_ ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
| 259 | 226 258 | eqbrtrd | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( ( 1 / ( ( 2 x. n ) + 1 ) ) x. ( ( 1 / ( ( 2 x. N ) + 1 ) ) ^ ( 2 x. n ) ) ) <_ ( ( 1 / ( ( ( 2 x. N ) + 1 ) ^ 2 ) ) ^ n ) ) |
| 260 | 259 185 203 | 3brtr4d | |- ( ( N e. NN /\ n e. ( 1 ... j ) ) -> ( K ` n ) <_ ( L ` n ) ) |
| 261 | 260 | adantlr | |- ( ( ( N e. NN /\ j e. NN ) /\ n e. ( 1 ... j ) ) -> ( K ` n ) <_ ( L ` n ) ) |
| 262 | 145 196 207 261 | serle | |- ( ( N e. NN /\ j e. NN ) -> ( seq 1 ( + , K ) ` j ) <_ ( seq 1 ( + , L ) ` j ) ) |
| 263 | 5 6 8 143 199 208 262 | climle | |- ( N e. NN -> ( ( B ` N ) - ( B ` ( N + 1 ) ) ) <_ ( ( 1 / 4 ) x. ( 1 / ( N x. ( N + 1 ) ) ) ) ) |