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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 12237 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7368 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12254 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12248 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11088 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11149 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12334 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12333 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7369 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2762 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12328 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2762 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2762 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1547 (class class class)co 7357 1c1 11031 + caddc 11033 · cmul 11035 2c2 12228 3c3 12229 6c6 12232 9c9 12235 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-mulcl 11092 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-1rid 11100 ax-cnre 11103 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-ss 3900 df-nul 4263 df-if 4456 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-br 5074 df-iota 6442 df-fv 6494 df-ov 7360 df-2 12236 df-3 12237 df-4 12238 df-5 12239 df-6 12240 df-7 12241 df-8 12242 df-9 12243 |
| This theorem is referenced by: sq3 14152 3dvds 16292 3dvdsdec 16293 3dvds2dec 16294 9nprm 17075 11prm 17077 43prm 17084 83prm 17085 317prm 17088 1259lem2 17094 1259lem4 17096 1259prm 17098 2503lem2 17100 mcubic 26830 log2tlbnd 26928 log2ublem3 26931 log2ub 26932 bposlem9 27274 lgsdir2lem5 27311 ex-lcm 30547 hgt750lem 34844 hgt750lem2 34845 3lexlogpow2ineq2 42553 3lexlogpow5ineq5 42554 3cubeslem3l 43144 3cubeslem3r 43145 inductionexd 44608 fmtno5lem3 48041 fmtno4prmfac193 48059 fmtno4nprmfac193 48060 127prm 48085 2exp340mod341 48232 9fppr8 48236 |
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