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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 12406 | . . 3 ⊢ 3 = (2 + 1) | |
| 2 | 1 | oveq2i 7431 | . 2 ⊢ (3 · 3) = (3 · (2 + 1)) |
| 3 | 3cn 12424 | . . . . 5 ⊢ 3 ∈ ℂ | |
| 4 | 2cn 12418 | . . . . 5 ⊢ 2 ∈ ℂ | |
| 5 | ax-1cn 11258 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 6 | 3, 4, 5 | adddii 11321 | . . . 4 ⊢ (3 · (2 + 1)) = ((3 · 2) + (3 · 1)) |
| 7 | 3t2e6 12508 | . . . . 5 ⊢ (3 · 2) = 6 | |
| 8 | 3t1e3 12507 | . . . . 5 ⊢ (3 · 1) = 3 | |
| 9 | 7, 8 | oveq12i 7432 | . . . 4 ⊢ ((3 · 2) + (3 · 1)) = (6 + 3) |
| 10 | 6, 9 | eqtri 2784 | . . 3 ⊢ (3 · (2 + 1)) = (6 + 3) |
| 11 | 6p3e9 12502 | . . 3 ⊢ (6 + 3) = 9 | |
| 12 | 10, 11 | eqtri 2784 | . 2 ⊢ (3 · (2 + 1)) = 9 |
| 13 | 2, 12 | eqtri 2784 | 1 ⊢ (3 · 3) = 9 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7420 1c1 11201 + caddc 11203 · cmul 11205 2c2 12397 3c3 12398 6c6 12401 9c9 12404 |
| 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 2733 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-mulcl 11262 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-1rid 11270 ax-cnre 11273 |
| 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 2740 df-cleq 2753 df-clel 2836 df-rex 3088 df-rab 3414 df-v 3453 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 6494 df-fv 6546 df-ov 7423 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 df-9 12412 |
| This theorem is used by: sq3 14341 3dvds 16501 3dvdsdec 16502 3dvds2dec 16503 9nprm 17290 11prm 17293 43prm 17300 83prm 17301 317prm 17304 1259lem2 17310 1259lem4 17312 1259prm 17314 2503lem2 17316 mcubic 27175 log2tlbnd 27273 log2ublem3 27276 log2ub 27277 bposlem9 27619 lgsdir2lem5 27656 ex-lcm 31059 hgt750lem 35280 hgt750lem2 35281 3lexlogpow2ineq2 43109 3lexlogpow5ineq5 43110 3cubeslem3l 43696 3cubeslem3r 43697 inductionexd 45154 fmtno5lem3 48639 fmtno4prmfac193 48657 fmtno4nprmfac193 48658 127prm 48683 2exp340mod341 48830 9fppr8 48834 |
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