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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 12419 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7441 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12437 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12431 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11271 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11334 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12521 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12520 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7442 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2786 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12515 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2786 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2786 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 (class class class)co 7430 1c1 11214 + caddc 11216 · cmul 11218 2c2 12410 3c3 12411 6c6 12414 9c9 12417 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-resscn 11270 ax-1cn 11271 ax-icn 11272 ax-addcl 11273 ax-mulcl 11275 ax-mulcom 11277 ax-addass 11278 ax-mulass 11279 ax-distr 11280 ax-1rid 11283 ax-cnre 11286 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2839 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-iota 6501 df-fv 6555 df-ov 7433 df-2 12418 df-3 12419 df-4 12420 df-5 12421 df-6 12422 df-7 12423 df-8 12424 df-9 12425 |
| This theorem is used by: sq3 14354 3dvds 16516 3dvdsdec 16517 3dvds2dec 16518 9nprm 17305 11prm 17308 43prm 17315 83prm 17316 317prm 17319 1259lem2 17325 1259lem4 17327 1259prm 17329 2503lem2 17331 mcubic 27190 log2tlbnd 27288 log2ublem3 27291 log2ub 27292 bposlem9 27634 lgsdir2lem5 27671 ex-lcm 31074 hgt750lem 35336 hgt750lem2 35337 3lexlogpow2ineq2 43252 3lexlogpow5ineq5 43253 3cubeslem3l 43839 3cubeslem3r 43840 inductionexd 45298 fmtno5lem3 48782 fmtno4prmfac193 48800 fmtno4nprmfac193 48801 127prm 48826 2exp340mod341 48973 9fppr8 48977 |
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