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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 12331 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7425 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12349 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12343 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11185 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11248 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12433 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12432 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7426 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2783 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12427 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2783 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2783 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7414 1c1 11128 + caddc 11130 · cmul 11132 2c2 12322 3c3 12323 6c6 12326 9c9 12329 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-mulcl 11189 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-1rid 11197 ax-cnre 11200 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-iota 6489 df-fv 6541 df-ov 7417 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 |
| This theorem is used by: sq3 14265 3dvds 16424 3dvdsdec 16425 3dvds2dec 16426 9nprm 17207 11prm 17210 43prm 17217 83prm 17218 317prm 17221 1259lem2 17227 1259lem4 17229 1259prm 17231 2503lem2 17233 mcubic 27087 log2tlbnd 27185 log2ublem3 27188 log2ub 27189 bposlem9 27531 lgsdir2lem5 27568 ex-lcm 30941 hgt750lem 35162 hgt750lem2 35163 3lexlogpow2ineq2 42928 3lexlogpow5ineq5 42929 3cubeslem3l 43534 3cubeslem3r 43535 inductionexd 44998 fmtno5lem3 48461 fmtno4prmfac193 48479 fmtno4nprmfac193 48480 127prm 48505 2exp340mod341 48652 9fppr8 48656 |
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