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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 12207 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7367 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12224 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12218 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11082 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11142 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12304 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12303 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7368 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2757 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12298 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2757 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2757 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 (class class class)co 7356 1c1 11025 + caddc 11027 · cmul 11029 2c2 12198 3c3 12199 6c6 12202 9c9 12205 |
| 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 2706 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-mulcl 11086 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-1rid 11094 ax-cnre 11097 |
| 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 2713 df-cleq 2726 df-clel 2809 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-iota 6446 df-fv 6498 df-ov 7359 df-2 12206 df-3 12207 df-4 12208 df-5 12209 df-6 12210 df-7 12211 df-8 12212 df-9 12213 |
| This theorem is referenced by: sq3 14119 3dvds 16256 3dvdsdec 16257 3dvds2dec 16258 9nprm 17038 11prm 17040 43prm 17047 83prm 17048 317prm 17051 1259lem2 17057 1259lem4 17059 1259prm 17061 2503lem2 17063 mcubic 26811 log2tlbnd 26909 log2ublem3 26912 log2ub 26913 bposlem9 27257 lgsdir2lem5 27294 ex-lcm 30482 hgt750lem 34757 hgt750lem2 34758 3lexlogpow2ineq2 42252 3lexlogpow5ineq5 42253 3cubeslem3l 42870 3cubeslem3r 42871 inductionexd 44338 fmtno5lem3 47743 fmtno4prmfac193 47761 fmtno4nprmfac193 47762 127prm 47787 2exp340mod341 47921 9fppr8 47925 |
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