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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 12211 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7369 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12228 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12222 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11086 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11146 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12308 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12307 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7370 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2759 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12302 | . . 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 1541 (class class class)co 7358 1c1 11029 + caddc 11031 · cmul 11033 2c2 12202 3c3 12203 6c6 12206 9c9 12209 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-mulcl 11090 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-1rid 11098 ax-cnre 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-2 12210 df-3 12211 df-4 12212 df-5 12213 df-6 12214 df-7 12215 df-8 12216 df-9 12217 |
| This theorem is referenced by: sq3 14123 3dvds 16260 3dvdsdec 16261 3dvds2dec 16262 9nprm 17042 11prm 17044 43prm 17051 83prm 17052 317prm 17055 1259lem2 17061 1259lem4 17063 1259prm 17065 2503lem2 17067 mcubic 26815 log2tlbnd 26913 log2ublem3 26916 log2ub 26917 bposlem9 27261 lgsdir2lem5 27298 ex-lcm 30535 hgt750lem 34810 hgt750lem2 34811 3lexlogpow2ineq2 42335 3lexlogpow5ineq5 42336 3cubeslem3l 42949 3cubeslem3r 42950 inductionexd 44417 fmtno5lem3 47822 fmtno4prmfac193 47840 fmtno4nprmfac193 47841 127prm 47866 2exp340mod341 48000 9fppr8 48004 |
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