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Description: Ordering property for complex exponentiation. (Contributed by Mario Carneiro, 8-Sep-2014)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cxpaddle.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| cxpaddle.2 | ⊢ ( 𝜑 → 0 ≤ 𝐴 ) | ||
| cxpaddle.3 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ ) | ||
| cxpaddle.4 | ⊢ ( 𝜑 → 0 ≤ 𝐵 ) | ||
| cxpaddle.5 | ⊢ ( 𝜑 → 𝐶 ∈ ℝ+ ) | ||
| cxpaddle.6 | ⊢ ( 𝜑 → 𝐶 ≤ 1 ) | ||
| Assertion | cxpaddle | ⊢ ( 𝜑 → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cxpaddle.1 | ⊢ ( 𝜑 → 𝐴 ∈ ℝ ) | |
| 2 | cxpaddle.2 | ⊢ ( 𝜑 → 0 ≤ 𝐴 ) | |
| 3 | cxpaddle.3 | ⊢ ( 𝜑 → 𝐵 ∈ ℝ ) | |
| 4 | cxpaddle.4 | ⊢ ( 𝜑 → 0 ≤ 𝐵 ) | |
| 5 | cxpaddle.5 | ⊢ ( 𝜑 → 𝐶 ∈ ℝ+ ) | |
| 6 | cxpaddle.6 | ⊢ ( 𝜑 → 𝐶 ≤ 1 ) | |
| 7 | 1 3 | readdcld | ⊢ ( 𝜑 → ( 𝐴 + 𝐵 ) ∈ ℝ ) |
| 8 | 1 3 2 4 | addge0d | ⊢ ( 𝜑 → 0 ≤ ( 𝐴 + 𝐵 ) ) |
| 9 | 5 | rpred | ⊢ ( 𝜑 → 𝐶 ∈ ℝ ) |
| 10 | 7 8 9 | recxpcld | ⊢ ( 𝜑 → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ∈ ℝ ) |
| 11 | 10 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ∈ ℝ ) |
| 12 | 11 | recnd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ∈ ℂ ) |
| 13 | 12 | mullidd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 1 · ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) = ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) |
| 14 | 1 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐴 ∈ ℝ ) |
| 15 | 7 | anim1i | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) |
| 16 | elrp | ⊢ ( ( 𝐴 + 𝐵 ) ∈ ℝ+ ↔ ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) | |
| 17 | 15 16 | sylibr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 + 𝐵 ) ∈ ℝ+ ) |
| 18 | 14 17 | rerpdivcld | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 / ( 𝐴 + 𝐵 ) ) ∈ ℝ ) |
| 19 | 3 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐵 ∈ ℝ ) |
| 20 | 19 17 | rerpdivcld | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐵 / ( 𝐴 + 𝐵 ) ) ∈ ℝ ) |
| 21 | 2 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 0 ≤ 𝐴 ) |
| 22 | 7 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 + 𝐵 ) ∈ ℝ ) |
| 23 | simpr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 0 < ( 𝐴 + 𝐵 ) ) | |
| 24 | divge0 | ⊢ ( ( ( 𝐴 ∈ ℝ ∧ 0 ≤ 𝐴 ) ∧ ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) → 0 ≤ ( 𝐴 / ( 𝐴 + 𝐵 ) ) ) | |
| 25 | 14 21 22 23 24 | syl22anc | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 0 ≤ ( 𝐴 / ( 𝐴 + 𝐵 ) ) ) |
| 26 | 9 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐶 ∈ ℝ ) |
| 27 | 18 25 26 | recxpcld | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ∈ ℝ ) |
| 28 | 4 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 0 ≤ 𝐵 ) |
| 29 | divge0 | ⊢ ( ( ( 𝐵 ∈ ℝ ∧ 0 ≤ 𝐵 ) ∧ ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) → 0 ≤ ( 𝐵 / ( 𝐴 + 𝐵 ) ) ) | |
| 30 | 19 28 22 23 29 | syl22anc | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 0 ≤ ( 𝐵 / ( 𝐴 + 𝐵 ) ) ) |
| 31 | 20 30 26 | recxpcld | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ∈ ℝ ) |
| 32 | 1 3 | addge01d | ⊢ ( 𝜑 → ( 0 ≤ 𝐵 ↔ 𝐴 ≤ ( 𝐴 + 𝐵 ) ) ) |
| 33 | 4 32 | mpbid | ⊢ ( 𝜑 → 𝐴 ≤ ( 𝐴 + 𝐵 ) ) |
| 34 | 33 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐴 ≤ ( 𝐴 + 𝐵 ) ) |
| 35 | 22 | recnd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 + 𝐵 ) ∈ ℂ ) |
| 36 | 35 | mulridd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) · 1 ) = ( 𝐴 + 𝐵 ) ) |
| 37 | 34 36 | breqtrrd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐴 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) |
| 38 | 1red | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 1 ∈ ℝ ) | |
| 39 | ledivmul | ⊢ ( ( 𝐴 ∈ ℝ ∧ 1 ∈ ℝ ∧ ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ≤ 1 ↔ 𝐴 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) ) | |
| 40 | 14 38 22 23 39 | syl112anc | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ≤ 1 ↔ 𝐴 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) ) |
| 41 | 37 40 | mpbird | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 / ( 𝐴 + 𝐵 ) ) ≤ 1 ) |
| 42 | 5 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐶 ∈ ℝ+ ) |
| 43 | 6 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐶 ≤ 1 ) |
| 44 | 18 25 41 42 43 | cxpaddlelem | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 / ( 𝐴 + 𝐵 ) ) ≤ ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ) |
| 45 | 3 1 | addge02d | ⊢ ( 𝜑 → ( 0 ≤ 𝐴 ↔ 𝐵 ≤ ( 𝐴 + 𝐵 ) ) ) |
| 46 | 2 45 | mpbid | ⊢ ( 𝜑 → 𝐵 ≤ ( 𝐴 + 𝐵 ) ) |
| 47 | 46 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐵 ≤ ( 𝐴 + 𝐵 ) ) |
| 48 | 47 36 | breqtrrd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐵 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) |
| 49 | ledivmul | ⊢ ( ( 𝐵 ∈ ℝ ∧ 1 ∈ ℝ ∧ ( ( 𝐴 + 𝐵 ) ∈ ℝ ∧ 0 < ( 𝐴 + 𝐵 ) ) ) → ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ≤ 1 ↔ 𝐵 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) ) | |
| 50 | 19 38 22 23 49 | syl112anc | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ≤ 1 ↔ 𝐵 ≤ ( ( 𝐴 + 𝐵 ) · 1 ) ) ) |
| 51 | 48 50 | mpbird | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐵 / ( 𝐴 + 𝐵 ) ) ≤ 1 ) |
| 52 | 20 30 51 42 43 | cxpaddlelem | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐵 / ( 𝐴 + 𝐵 ) ) ≤ ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ) |
| 53 | 18 20 27 31 44 52 | le2addd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) + ( 𝐵 / ( 𝐴 + 𝐵 ) ) ) ≤ ( ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) + ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ) ) |
| 54 | 14 | recnd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐴 ∈ ℂ ) |
| 55 | 19 | recnd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐵 ∈ ℂ ) |
| 56 | 17 | rpne0d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 + 𝐵 ) ≠ 0 ) |
| 57 | 54 55 35 56 | divdird | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) / ( 𝐴 + 𝐵 ) ) = ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) + ( 𝐵 / ( 𝐴 + 𝐵 ) ) ) ) |
| 58 | 35 56 | dividd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) / ( 𝐴 + 𝐵 ) ) = 1 ) |
| 59 | 57 58 | eqtr3d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) + ( 𝐵 / ( 𝐴 + 𝐵 ) ) ) = 1 ) |
| 60 | 9 | recnd | ⊢ ( 𝜑 → 𝐶 ∈ ℂ ) |
| 61 | 60 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 𝐶 ∈ ℂ ) |
| 62 | 14 21 17 61 | divcxpd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) = ( ( 𝐴 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) |
| 63 | 19 28 17 61 | divcxpd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) = ( ( 𝐵 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) |
| 64 | 62 63 | oveq12d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) + ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ) = ( ( ( 𝐴 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) + ( ( 𝐵 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) ) |
| 65 | 1 2 9 | recxpcld | ⊢ ( 𝜑 → ( 𝐴 ↑𝑐 𝐶 ) ∈ ℝ ) |
| 66 | 65 | recnd | ⊢ ( 𝜑 → ( 𝐴 ↑𝑐 𝐶 ) ∈ ℂ ) |
| 67 | 66 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐴 ↑𝑐 𝐶 ) ∈ ℂ ) |
| 68 | 3 4 9 | recxpcld | ⊢ ( 𝜑 → ( 𝐵 ↑𝑐 𝐶 ) ∈ ℝ ) |
| 69 | 68 | recnd | ⊢ ( 𝜑 → ( 𝐵 ↑𝑐 𝐶 ) ∈ ℂ ) |
| 70 | 69 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 𝐵 ↑𝑐 𝐶 ) ∈ ℂ ) |
| 71 | 17 26 | rpcxpcld | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ∈ ℝ+ ) |
| 72 | 71 | rpne0d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≠ 0 ) |
| 73 | 67 70 12 72 | divdird | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) = ( ( ( 𝐴 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) + ( ( 𝐵 ↑𝑐 𝐶 ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) ) |
| 74 | 64 73 | eqtr4d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( ( 𝐴 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) + ( ( 𝐵 / ( 𝐴 + 𝐵 ) ) ↑𝑐 𝐶 ) ) = ( ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) |
| 75 | 53 59 74 | 3brtr3d | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → 1 ≤ ( ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) |
| 76 | 65 68 | readdcld | ⊢ ( 𝜑 → ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ∈ ℝ ) |
| 77 | 76 | adantr | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ∈ ℝ ) |
| 78 | 38 77 71 | lemuldivd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 1 · ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ↔ 1 ≤ ( ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) / ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ) ) |
| 79 | 75 78 | mpbird | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( 1 · ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| 80 | 13 79 | eqbrtrrd | ⊢ ( ( 𝜑 ∧ 0 < ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| 81 | 5 | rpne0d | ⊢ ( 𝜑 → 𝐶 ≠ 0 ) |
| 82 | 60 81 | 0cxpd | ⊢ ( 𝜑 → ( 0 ↑𝑐 𝐶 ) = 0 ) |
| 83 | 1 2 9 | cxpge0d | ⊢ ( 𝜑 → 0 ≤ ( 𝐴 ↑𝑐 𝐶 ) ) |
| 84 | 3 4 9 | cxpge0d | ⊢ ( 𝜑 → 0 ≤ ( 𝐵 ↑𝑐 𝐶 ) ) |
| 85 | 65 68 83 84 | addge0d | ⊢ ( 𝜑 → 0 ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| 86 | 82 85 | eqbrtrd | ⊢ ( 𝜑 → ( 0 ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| 87 | oveq1 | ⊢ ( 0 = ( 𝐴 + 𝐵 ) → ( 0 ↑𝑐 𝐶 ) = ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ) | |
| 88 | 87 | breq1d | ⊢ ( 0 = ( 𝐴 + 𝐵 ) → ( ( 0 ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ↔ ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) ) |
| 89 | 86 88 | syl5ibcom | ⊢ ( 𝜑 → ( 0 = ( 𝐴 + 𝐵 ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) ) |
| 90 | 89 | imp | ⊢ ( ( 𝜑 ∧ 0 = ( 𝐴 + 𝐵 ) ) → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |
| 91 | 0re | ⊢ 0 ∈ ℝ | |
| 92 | leloe | ⊢ ( ( 0 ∈ ℝ ∧ ( 𝐴 + 𝐵 ) ∈ ℝ ) → ( 0 ≤ ( 𝐴 + 𝐵 ) ↔ ( 0 < ( 𝐴 + 𝐵 ) ∨ 0 = ( 𝐴 + 𝐵 ) ) ) ) | |
| 93 | 91 7 92 | sylancr | ⊢ ( 𝜑 → ( 0 ≤ ( 𝐴 + 𝐵 ) ↔ ( 0 < ( 𝐴 + 𝐵 ) ∨ 0 = ( 𝐴 + 𝐵 ) ) ) ) |
| 94 | 8 93 | mpbid | ⊢ ( 𝜑 → ( 0 < ( 𝐴 + 𝐵 ) ∨ 0 = ( 𝐴 + 𝐵 ) ) ) |
| 95 | 80 90 94 | mpjaodan | ⊢ ( 𝜑 → ( ( 𝐴 + 𝐵 ) ↑𝑐 𝐶 ) ≤ ( ( 𝐴 ↑𝑐 𝐶 ) + ( 𝐵 ↑𝑐 𝐶 ) ) ) |