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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 12304 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7422 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12322 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12316 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11158 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11221 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12406 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12405 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7423 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2792 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12400 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2792 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2792 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 (class class class)co 7411 1c1 11101 + caddc 11103 · cmul 11105 2c2 12295 3c3 12296 6c6 12299 9c9 12302 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-resscn 11157 ax-1cn 11158 ax-icn 11159 ax-addcl 11160 ax-mulcl 11162 ax-mulcom 11164 ax-addass 11165 ax-mulass 11166 ax-distr 11167 ax-1rid 11170 ax-cnre 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-iota 6493 df-fv 6545 df-ov 7414 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 df-9 12310 |
| This theorem is referenced by: sq3 14234 3dvds 16389 3dvdsdec 16390 3dvds2dec 16391 9nprm 17172 11prm 17175 43prm 17182 83prm 17183 317prm 17186 1259lem2 17192 1259lem4 17194 1259prm 17196 2503lem2 17198 mcubic 26978 log2tlbnd 27076 log2ublem3 27079 log2ub 27080 bposlem9 27422 lgsdir2lem5 27459 ex-lcm 30750 hgt750lem 34983 hgt750lem2 34984 3lexlogpow2ineq2 42750 3lexlogpow5ineq5 42751 3cubeslem3l 43343 3cubeslem3r 43344 inductionexd 44807 fmtno5lem3 48230 fmtno4prmfac193 48248 fmtno4nprmfac193 48249 127prm 48274 2exp340mod341 48421 9fppr8 48425 |
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