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| Mirrors > Home > MPE Home > Th. List > 7t7e49 | Structured version Visualization version GIF version | ||
| Description: 7 times 7 equals 49. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| 7t7e49 | ⊢ (7 · 7) = ;49 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 7nn0 12597 | . 2 ⊢ 7 ∈ ℕ0 | |
| 2 | 6nn0 12596 | . 2 ⊢ 6 ∈ ℕ0 | |
| 3 | df-7 12379 | . 2 ⊢ 7 = (6 + 1) | |
| 4 | 7t6e42 12901 | . 2 ⊢ (7 · 6) = ;42 | |
| 5 | 4nn0 12594 | . . 3 ⊢ 4 ∈ ℕ0 | |
| 6 | 2nn0 12592 | . . 3 ⊢ 2 ∈ ℕ0 | |
| 7 | eqid 2760 | . . 3 ⊢ ;42 = ;42 | |
| 8 | 7cn 12406 | . . . 4 ⊢ 7 ∈ ℂ | |
| 9 | 2cn 12387 | . . . 4 ⊢ 2 ∈ ℂ | |
| 10 | 7p2e9 12472 | . . . 4 ⊢ (7 + 2) = 9 | |
| 11 | 8, 9, 10 | addcomli 11473 | . . 3 ⊢ (2 + 7) = 9 |
| 12 | 5, 6, 1, 7, 11 | decaddi 12848 | . 2 ⊢ (;42 + 7) = ;49 |
| 13 | 1, 2, 3, 4, 12 | 4t3lem 12885 | 1 ⊢ (7 · 7) = ;49 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7408 · cmul 11176 2c2 12366 4c4 12368 6c6 12370 7c7 12371 9c9 12373 ;cdc 12783 |
| 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-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-resscn 11228 ax-1cn 11229 ax-icn 11230 ax-addcl 11231 ax-addrcl 11232 ax-mulcl 11233 ax-mulrcl 11234 ax-mulcom 11235 ax-addass 11236 ax-mulass 11237 ax-distr 11238 ax-i2m1 11239 ax-1ne0 11240 ax-1rid 11241 ax-rnegex 11242 ax-rrecex 11243 ax-cnre 11244 ax-pre-lttri 11245 ax-pre-lttrn 11246 ax-pre-ltadd 11247 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5542 df-eprel 5547 df-po 5555 df-so 5556 df-fr 5600 df-we 5602 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-pred 6293 df-ord 6354 df-on 6355 df-lim 6356 df-suc 6357 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-f1 6532 df-fo 6533 df-f1o 6534 df-fv 6535 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7861 df-2nd 7985 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-er 8695 df-en 8952 df-dom 8953 df-sdom 8954 df-pnf 11316 df-mnf 11317 df-ltxr 11319 df-sub 11514 df-nn 12305 df-2 12374 df-3 12375 df-4 12376 df-5 12377 df-6 12378 df-7 12379 df-8 12380 df-9 12381 df-n0 12576 df-dec 12784 |
| This theorem is used by: 631prm 17266 1259lem3 17272 2503lem2 17277 4001lem1 17280 log2ub 27240 bposlem8 27581 hgt750lem2 35215 60gcd7e1 42975 3exp7 43023 3lexlogpow5ineq1 43024 sq7 43275 resqrtvalex 44589 imsqrtvalex 44590 127prm 48606 |
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