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Mirrors > Home > MPE Home > Th. List > 8th4div3 | Structured version Visualization version GIF version |
Description: An eighth of four thirds is a sixth. (Contributed by Paul Chapman, 24-Nov-2007.) |
Ref | Expression |
---|---|
8th4div3 | ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 9873 | . . . 4 ⊢ 1 ∈ ℂ | |
2 | 8re 10982 | . . . . 5 ⊢ 8 ∈ ℝ | |
3 | 2 | recni 9931 | . . . 4 ⊢ 8 ∈ ℂ |
4 | 4cn 10975 | . . . 4 ⊢ 4 ∈ ℂ | |
5 | 3cn 10972 | . . . 4 ⊢ 3 ∈ ℂ | |
6 | 8pos 10998 | . . . . 5 ⊢ 0 < 8 | |
7 | 2, 6 | gt0ne0ii 10443 | . . . 4 ⊢ 8 ≠ 0 |
8 | 3ne0 10992 | . . . 4 ⊢ 3 ≠ 0 | |
9 | 1, 3, 4, 5, 7, 8 | divmuldivi 10664 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
10 | 1, 4 | mulcomi 9925 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
11 | 2cn 10968 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
12 | 4, 11, 5 | mul32i 10111 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
13 | 4t2e8 11058 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
14 | 13 | oveq1i 6559 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
15 | 12, 14 | eqtr3i 2634 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
16 | 4, 5, 11 | mulassi 9928 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
17 | 15, 16 | eqtr3i 2634 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
18 | 3t2e6 11056 | . . . . . 6 ⊢ (3 · 2) = 6 | |
19 | 18 | oveq2i 6560 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
20 | 17, 19 | eqtri 2632 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
21 | 10, 20 | oveq12i 6561 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
22 | 9, 21 | eqtri 2632 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
23 | 6re 10978 | . . . 4 ⊢ 6 ∈ ℝ | |
24 | 23 | recni 9931 | . . 3 ⊢ 6 ∈ ℂ |
25 | 6pos 10996 | . . . 4 ⊢ 0 < 6 | |
26 | 23, 25 | gt0ne0ii 10443 | . . 3 ⊢ 6 ≠ 0 |
27 | 4ne0 10994 | . . 3 ⊢ 4 ≠ 0 | |
28 | divcan5 10606 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
29 | 1, 28 | mp3an1 1403 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
30 | 24, 26, 4, 27, 29 | mp4an 705 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
31 | 22, 30 | eqtri 2632 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 383 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 (class class class)co 6549 ℂcc 9813 0cc0 9815 1c1 9816 · cmul 9820 / cdiv 10563 2c2 10947 3c3 10948 4c4 10949 6c6 10951 8c8 10953 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-po 4959 df-so 4960 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-8 10962 |
This theorem is referenced by: (None) |
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