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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 12321 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7430 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12339 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12333 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11175 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11238 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12423 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12422 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7431 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2788 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12417 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2788 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2788 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7419 1c1 11118 + caddc 11120 · cmul 11122 2c2 12312 3c3 12313 6c6 12316 9c9 12319 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-mulcl 11179 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-1rid 11187 ax-cnre 11190 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-iota 6496 df-fv 6548 df-ov 7422 df-2 12320 df-3 12321 df-4 12322 df-5 12323 df-6 12324 df-7 12325 df-8 12326 df-9 12327 |
| This theorem is used by: sq3 14254 3dvds 16413 3dvdsdec 16414 3dvds2dec 16415 9nprm 17196 11prm 17199 43prm 17206 83prm 17207 317prm 17210 1259lem2 17216 1259lem4 17218 1259prm 17220 2503lem2 17222 mcubic 27065 log2tlbnd 27163 log2ublem3 27166 log2ub 27167 bposlem9 27509 lgsdir2lem5 27546 ex-lcm 30882 hgt750lem 35105 hgt750lem2 35106 3lexlogpow2ineq2 42886 3lexlogpow5ineq5 42887 3cubeslem3l 43477 3cubeslem3r 43478 inductionexd 44941 fmtno5lem3 48367 fmtno4prmfac193 48385 fmtno4nprmfac193 48386 127prm 48411 2exp340mod341 48558 9fppr8 48562 |
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