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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 9994 | . . . 4 ⊢ 1 ∈ ℂ | |
2 | 8re 11105 | . . . . 5 ⊢ 8 ∈ ℝ | |
3 | 2 | recni 10052 | . . . 4 ⊢ 8 ∈ ℂ |
4 | 4cn 11098 | . . . 4 ⊢ 4 ∈ ℂ | |
5 | 3cn 11095 | . . . 4 ⊢ 3 ∈ ℂ | |
6 | 8pos 11121 | . . . . 5 ⊢ 0 < 8 | |
7 | 2, 6 | gt0ne0ii 10564 | . . . 4 ⊢ 8 ≠ 0 |
8 | 3ne0 11115 | . . . 4 ⊢ 3 ≠ 0 | |
9 | 1, 3, 4, 5, 7, 8 | divmuldivi 10785 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
10 | 1, 4 | mulcomi 10046 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
11 | 2cn 11091 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
12 | 4, 11, 5 | mul32i 10232 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
13 | 4t2e8 11181 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
14 | 13 | oveq1i 6660 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
15 | 12, 14 | eqtr3i 2646 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
16 | 4, 5, 11 | mulassi 10049 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
17 | 15, 16 | eqtr3i 2646 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
18 | 3t2e6 11179 | . . . . . 6 ⊢ (3 · 2) = 6 | |
19 | 18 | oveq2i 6661 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
20 | 17, 19 | eqtri 2644 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
21 | 10, 20 | oveq12i 6662 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
22 | 9, 21 | eqtri 2644 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
23 | 6re 11101 | . . . 4 ⊢ 6 ∈ ℝ | |
24 | 23 | recni 10052 | . . 3 ⊢ 6 ∈ ℂ |
25 | 6pos 11119 | . . . 4 ⊢ 0 < 6 | |
26 | 23, 25 | gt0ne0ii 10564 | . . 3 ⊢ 6 ≠ 0 |
27 | 4ne0 11117 | . . 3 ⊢ 4 ≠ 0 | |
28 | divcan5 10727 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
29 | 1, 28 | mp3an1 1411 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
30 | 24, 26, 4, 27, 29 | mp4an 709 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
31 | 22, 30 | eqtri 2644 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 384 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 (class class class)co 6650 ℂcc 9934 0cc0 9936 1c1 9937 · cmul 9941 / cdiv 10684 2c2 11070 3c3 11071 4c4 11072 6c6 11074 8c8 11076 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-po 5035 df-so 5036 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-2 11079 df-3 11080 df-4 11081 df-5 11082 df-6 11083 df-7 11084 df-8 11085 |
This theorem is referenced by: (None) |
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