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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 12180 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7351 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12197 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12191 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11055 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11115 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12277 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12276 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7352 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2752 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12271 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2752 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2752 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 (class class class)co 7340 1c1 10998 + caddc 11000 · cmul 11002 2c2 12171 3c3 12172 6c6 12175 9c9 12178 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-resscn 11054 ax-1cn 11055 ax-icn 11056 ax-addcl 11057 ax-mulcl 11059 ax-mulcom 11061 ax-addass 11062 ax-mulass 11063 ax-distr 11064 ax-1rid 11067 ax-cnre 11070 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-rex 3054 df-rab 3393 df-v 3435 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5089 df-iota 6432 df-fv 6484 df-ov 7343 df-2 12179 df-3 12180 df-4 12181 df-5 12182 df-6 12183 df-7 12184 df-8 12185 df-9 12186 |
| This theorem is referenced by: sq3 14093 3dvds 16229 3dvdsdec 16230 3dvds2dec 16231 9nprm 17011 11prm 17013 43prm 17020 83prm 17021 317prm 17024 1259lem2 17030 1259lem4 17032 1259prm 17034 2503lem2 17036 mcubic 26738 log2tlbnd 26836 log2ublem3 26839 log2ub 26840 bposlem9 27184 lgsdir2lem5 27221 ex-lcm 30389 hgt750lem 34632 hgt750lem2 34633 3lexlogpow2ineq2 42049 3lexlogpow5ineq5 42050 3cubeslem3l 42676 3cubeslem3r 42677 inductionexd 44145 fmtno5lem3 47553 fmtno4prmfac193 47571 fmtno4nprmfac193 47572 127prm 47597 2exp340mod341 47731 9fppr8 47735 |
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