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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 12239 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7372 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12256 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12250 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11090 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11151 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12336 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12335 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7373 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2760 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12330 | . . 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 7361 1c1 11033 + caddc 11035 · cmul 11037 2c2 12230 3c3 12231 6c6 12234 9c9 12237 |
| 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 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-mulcl 11094 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-1rid 11102 ax-cnre 11105 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-iota 6449 df-fv 6501 df-ov 7364 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 |
| This theorem is referenced by: sq3 14154 3dvds 16294 3dvdsdec 16295 3dvds2dec 16296 9nprm 17077 11prm 17079 43prm 17086 83prm 17087 317prm 17090 1259lem2 17096 1259lem4 17098 1259prm 17100 2503lem2 17102 mcubic 26827 log2tlbnd 26925 log2ublem3 26928 log2ub 26929 bposlem9 27272 lgsdir2lem5 27309 ex-lcm 30546 hgt750lem 34814 hgt750lem2 34815 3lexlogpow2ineq2 42515 3lexlogpow5ineq5 42516 3cubeslem3l 43135 3cubeslem3r 43136 inductionexd 44603 fmtno5lem3 48033 fmtno4prmfac193 48051 fmtno4nprmfac193 48052 127prm 48077 2exp340mod341 48224 9fppr8 48228 |
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