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| Mirrors > Home > MPE Home > Th. List > 3t3e9 | Structured version Visualization version GIF version | ||
| Description: 3 times 3 equals 9. (Contributed by NM, 11-May-2004.) |
| Ref | Expression |
|---|---|
| 3t3e9 | ⊢ (3 · 3) = 9 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 12221 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7379 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12238 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12232 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11096 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11156 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12318 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12317 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7380 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2760 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12312 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2760 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2760 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7368 1c1 11039 + caddc 11041 · cmul 11043 2c2 12212 3c3 12213 6c6 12216 9c9 12219 |
| 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-ext 2709 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-mulcl 11100 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-1rid 11108 ax-cnre 11111 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-iota 6456 df-fv 6508 df-ov 7371 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 |
| This theorem is referenced by: sq3 14133 3dvds 16270 3dvdsdec 16271 3dvds2dec 16272 9nprm 17052 11prm 17054 43prm 17061 83prm 17062 317prm 17065 1259lem2 17071 1259lem4 17073 1259prm 17075 2503lem2 17077 mcubic 26828 log2tlbnd 26926 log2ublem3 26929 log2ub 26930 bposlem9 27274 lgsdir2lem5 27311 ex-lcm 30549 hgt750lem 34833 hgt750lem2 34834 3lexlogpow2ineq2 42433 3lexlogpow5ineq5 42434 3cubeslem3l 43047 3cubeslem3r 43048 inductionexd 44515 fmtno5lem3 47919 fmtno4prmfac193 47937 fmtno4nprmfac193 47938 127prm 47963 2exp340mod341 48097 9fppr8 48101 |
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