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Mirrors > Home > ILE Home > Th. List > divdivap1 | GIF version |
Description: Division into a fraction. (Contributed by Jim Kingdon, 26-Feb-2020.) |
Ref | Expression |
---|---|
divdivap1 | ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / 𝐶) = (𝐴 / (𝐵 · 𝐶))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 7838 | . . . . 5 ⊢ 1 ∈ ℂ | |
2 | 1ap0 8480 | . . . . 5 ⊢ 1 # 0 | |
3 | 1, 2 | pm3.2i 270 | . . . 4 ⊢ (1 ∈ ℂ ∧ 1 # 0) |
4 | divdivdivap 8601 | . . . 4 ⊢ (((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0)) ∧ ((𝐶 ∈ ℂ ∧ 𝐶 # 0) ∧ (1 ∈ ℂ ∧ 1 # 0))) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) | |
5 | 3, 4 | mpanr2 435 | . . 3 ⊢ (((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0)) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) |
6 | 5 | 3impa 1183 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 · 1) / (𝐵 · 𝐶))) |
7 | div1 8591 | . . . . 5 ⊢ (𝐶 ∈ ℂ → (𝐶 / 1) = 𝐶) | |
8 | 7 | oveq2d 5853 | . . . 4 ⊢ (𝐶 ∈ ℂ → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
9 | 8 | ad2antrl 482 | . . 3 ⊢ (((𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
10 | 9 | 3adant1 1004 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / (𝐶 / 1)) = ((𝐴 / 𝐵) / 𝐶)) |
11 | mulid1 7888 | . . . 4 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
12 | 11 | oveq1d 5852 | . . 3 ⊢ (𝐴 ∈ ℂ → ((𝐴 · 1) / (𝐵 · 𝐶)) = (𝐴 / (𝐵 · 𝐶))) |
13 | 12 | 3ad2ant1 1007 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 · 1) / (𝐵 · 𝐶)) = (𝐴 / (𝐵 · 𝐶))) |
14 | 6, 10, 13 | 3eqtr3d 2205 | 1 ⊢ ((𝐴 ∈ ℂ ∧ (𝐵 ∈ ℂ ∧ 𝐵 # 0) ∧ (𝐶 ∈ ℂ ∧ 𝐶 # 0)) → ((𝐴 / 𝐵) / 𝐶) = (𝐴 / (𝐵 · 𝐶))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∧ w3a 967 = wceq 1342 ∈ wcel 2135 class class class wbr 3977 (class class class)co 5837 ℂcc 7743 0cc0 7745 1c1 7746 · cmul 7750 # cap 8471 / cdiv 8560 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-13 2137 ax-14 2138 ax-ext 2146 ax-sep 4095 ax-pow 4148 ax-pr 4182 ax-un 4406 ax-setind 4509 ax-cnex 7836 ax-resscn 7837 ax-1cn 7838 ax-1re 7839 ax-icn 7840 ax-addcl 7841 ax-addrcl 7842 ax-mulcl 7843 ax-mulrcl 7844 ax-addcom 7845 ax-mulcom 7846 ax-addass 7847 ax-mulass 7848 ax-distr 7849 ax-i2m1 7850 ax-0lt1 7851 ax-1rid 7852 ax-0id 7853 ax-rnegex 7854 ax-precex 7855 ax-cnre 7856 ax-pre-ltirr 7857 ax-pre-ltwlin 7858 ax-pre-lttrn 7859 ax-pre-apti 7860 ax-pre-ltadd 7861 ax-pre-mulgt0 7862 ax-pre-mulext 7863 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-fal 1348 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-ne 2335 df-nel 2430 df-ral 2447 df-rex 2448 df-reu 2449 df-rmo 2450 df-rab 2451 df-v 2724 df-sbc 2948 df-dif 3114 df-un 3116 df-in 3118 df-ss 3125 df-pw 3556 df-sn 3577 df-pr 3578 df-op 3580 df-uni 3785 df-br 3978 df-opab 4039 df-id 4266 df-po 4269 df-iso 4270 df-xp 4605 df-rel 4606 df-cnv 4607 df-co 4608 df-dm 4609 df-iota 5148 df-fun 5185 df-fv 5191 df-riota 5793 df-ov 5840 df-oprab 5841 df-mpo 5842 df-pnf 7927 df-mnf 7928 df-xr 7929 df-ltxr 7930 df-le 7931 df-sub 8063 df-neg 8064 df-reap 8465 df-ap 8472 df-div 8561 |
This theorem is referenced by: recdivap2 8613 divdivap1d 8710 sin01bnd 11685 |
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