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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 11087 | . . . 4 ⊢ 1 ∈ ℂ | |
| 2 | 8re 12268 | . . . . 5 ⊢ 8 ∈ ℝ | |
| 3 | 2 | recni 11150 | . . . 4 ⊢ 8 ∈ ℂ |
| 4 | 4cn 12257 | . . . 4 ⊢ 4 ∈ ℂ | |
| 5 | 3cn 12253 | . . . 4 ⊢ 3 ∈ ℂ | |
| 6 | 8pos 12284 | . . . . 5 ⊢ 0 < 8 | |
| 7 | 2, 6 | gt0ne0ii 11677 | . . . 4 ⊢ 8 ≠ 0 |
| 8 | 3ne0 12278 | . . . 4 ⊢ 3 ≠ 0 | |
| 9 | 1, 3, 4, 5, 7, 8 | divmuldivi 11906 | . . 3 ⊢ ((1 / 8) · (4 / 3)) = ((1 · 4) / (8 · 3)) |
| 10 | 1, 4 | mulcomi 11144 | . . . 4 ⊢ (1 · 4) = (4 · 1) |
| 11 | 2cn 12247 | . . . . . . . 8 ⊢ 2 ∈ ℂ | |
| 12 | 4, 11, 5 | mul32i 11333 | . . . . . . 7 ⊢ ((4 · 2) · 3) = ((4 · 3) · 2) |
| 13 | 4t2e8 12335 | . . . . . . . 8 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7370 | . . . . . . 7 ⊢ ((4 · 2) · 3) = (8 · 3) |
| 15 | 12, 14 | eqtr3i 2762 | . . . . . 6 ⊢ ((4 · 3) · 2) = (8 · 3) |
| 16 | 4, 5, 11 | mulassi 11147 | . . . . . 6 ⊢ ((4 · 3) · 2) = (4 · (3 · 2)) |
| 17 | 15, 16 | eqtr3i 2762 | . . . . 5 ⊢ (8 · 3) = (4 · (3 · 2)) |
| 18 | 3t2e6 12333 | . . . . . 6 ⊢ (3 · 2) = 6 | |
| 19 | 18 | oveq2i 7371 | . . . . 5 ⊢ (4 · (3 · 2)) = (4 · 6) |
| 20 | 17, 19 | eqtri 2760 | . . . 4 ⊢ (8 · 3) = (4 · 6) |
| 21 | 10, 20 | oveq12i 7372 | . . 3 ⊢ ((1 · 4) / (8 · 3)) = ((4 · 1) / (4 · 6)) |
| 22 | 9, 21 | eqtri 2760 | . 2 ⊢ ((1 / 8) · (4 / 3)) = ((4 · 1) / (4 · 6)) |
| 23 | 6re 12262 | . . . 4 ⊢ 6 ∈ ℝ | |
| 24 | 23 | recni 11150 | . . 3 ⊢ 6 ∈ ℂ |
| 25 | 6pos 12282 | . . . 4 ⊢ 0 < 6 | |
| 26 | 23, 25 | gt0ne0ii 11677 | . . 3 ⊢ 6 ≠ 0 |
| 27 | 4ne0 12280 | . . 3 ⊢ 4 ≠ 0 | |
| 28 | divcan5 11848 | . . . 4 ⊢ ((1 ∈ ℂ ∧ (6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) | |
| 29 | 1, 28 | mp3an1 1451 | . . 3 ⊢ (((6 ∈ ℂ ∧ 6 ≠ 0) ∧ (4 ∈ ℂ ∧ 4 ≠ 0)) → ((4 · 1) / (4 · 6)) = (1 / 6)) |
| 30 | 24, 26, 4, 27, 29 | mp4an 694 | . 2 ⊢ ((4 · 1) / (4 · 6)) = (1 / 6) |
| 31 | 22, 30 | eqtri 2760 | 1 ⊢ ((1 / 8) · (4 / 3)) = (1 / 6) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7360 ℂcc 11027 0cc0 11029 1c1 11030 · cmul 11034 / cdiv 11798 2c2 12227 3c3 12228 4c4 12229 6c6 12231 8c8 12233 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 |
| This theorem is referenced by: (None) |
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