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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 12282 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7408 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12300 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12294 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11132 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11195 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12384 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12383 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7409 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2786 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12378 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2786 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2786 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1561 (class class class)co 7397 1c1 11075 + caddc 11077 · cmul 11079 2c2 12273 3c3 12274 6c6 12277 9c9 12280 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-ext 2735 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-mulcl 11136 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-1rid 11144 ax-cnre 11147 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-sb 2092 df-clab 2742 df-cleq 2755 df-clel 2838 df-rex 3088 df-rab 3416 df-v 3457 df-dif 3908 df-un 3910 df-ss 3922 df-nul 4287 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5102 df-iota 6478 df-fv 6530 df-ov 7400 df-2 12281 df-3 12282 df-4 12283 df-5 12284 df-6 12285 df-7 12286 df-8 12287 df-9 12288 |
| This theorem is referenced by: sq3 14212 3dvds 16366 3dvdsdec 16367 3dvds2dec 16368 9nprm 17149 11prm 17152 43prm 17159 83prm 17160 317prm 17163 1259lem2 17169 1259lem4 17171 1259prm 17173 2503lem2 17175 mcubic 26913 log2tlbnd 27011 log2ublem3 27014 log2ub 27015 bposlem9 27357 lgsdir2lem5 27394 ex-lcm 30661 hgt750lem 34946 hgt750lem2 34947 3lexlogpow2ineq2 42677 3lexlogpow5ineq5 42678 3cubeslem3l 43268 3cubeslem3r 43269 inductionexd 44732 fmtno5lem3 48165 fmtno4prmfac193 48183 fmtno4nprmfac193 48184 127prm 48209 2exp340mod341 48356 9fppr8 48360 |
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