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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 12245 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7378 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12262 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12256 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11096 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11157 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12342 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12341 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7379 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2759 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12336 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2759 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2759 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7367 1c1 11039 + caddc 11041 · cmul 11043 2c2 12236 3c3 12237 6c6 12240 9c9 12243 |
| 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 2708 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 2715 df-cleq 2728 df-clel 2811 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-iota 6454 df-fv 6506 df-ov 7370 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 |
| This theorem is referenced by: sq3 14160 3dvds 16300 3dvdsdec 16301 3dvds2dec 16302 9nprm 17083 11prm 17085 43prm 17092 83prm 17093 317prm 17096 1259lem2 17102 1259lem4 17104 1259prm 17106 2503lem2 17108 mcubic 26811 log2tlbnd 26909 log2ublem3 26912 log2ub 26913 bposlem9 27255 lgsdir2lem5 27292 ex-lcm 30528 hgt750lem 34795 hgt750lem2 34796 3lexlogpow2ineq2 42498 3lexlogpow5ineq5 42499 3cubeslem3l 43118 3cubeslem3r 43119 inductionexd 44582 fmtno5lem3 48018 fmtno4prmfac193 48036 fmtno4nprmfac193 48037 127prm 48062 2exp340mod341 48209 9fppr8 48213 |
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