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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 12425 | . 2 ⊢ 7 ∈ ℕ0 | |
| 2 | 6nn0 12424 | . 2 ⊢ 6 ∈ ℕ0 | |
| 3 | df-7 12215 | . 2 ⊢ 7 = (6 + 1) | |
| 4 | 7t6e42 12722 | . 2 ⊢ (7 · 6) = ;42 | |
| 5 | 4nn0 12422 | . . 3 ⊢ 4 ∈ ℕ0 | |
| 6 | 2nn0 12420 | . . 3 ⊢ 2 ∈ ℕ0 | |
| 7 | eqid 2735 | . . 3 ⊢ ;42 = ;42 | |
| 8 | 7cn 12241 | . . . 4 ⊢ 7 ∈ ℂ | |
| 9 | 2cn 12222 | . . . 4 ⊢ 2 ∈ ℂ | |
| 10 | 7p2e9 12303 | . . . 4 ⊢ (7 + 2) = 9 | |
| 11 | 8, 9, 10 | addcomli 11327 | . . 3 ⊢ (2 + 7) = 9 |
| 12 | 5, 6, 1, 7, 11 | decaddi 12669 | . 2 ⊢ (;42 + 7) = ;49 |
| 13 | 1, 2, 3, 4, 12 | 4t3lem 12706 | 1 ⊢ (7 · 7) = ;49 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 (class class class)co 7358 · cmul 11033 2c2 12202 4c4 12204 6c6 12206 7c7 12207 9c9 12209 ;cdc 12609 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2183 ax-ext 2707 ax-sep 5240 ax-nul 5250 ax-pow 5309 ax-pr 5376 ax-un 7680 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2932 df-nel 3036 df-ral 3051 df-rex 3060 df-reu 3350 df-rab 3399 df-v 3441 df-sbc 3740 df-csb 3849 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-pss 3920 df-nul 4285 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4947 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6258 df-ord 6319 df-on 6320 df-lim 6321 df-suc 6322 df-iota 6447 df-fun 6493 df-fn 6494 df-f 6495 df-f1 6496 df-fo 6497 df-f1o 6498 df-fv 6499 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-er 8635 df-en 8886 df-dom 8887 df-sdom 8888 df-pnf 11170 df-mnf 11171 df-ltxr 11173 df-sub 11368 df-nn 12148 df-2 12210 df-3 12211 df-4 12212 df-5 12213 df-6 12214 df-7 12215 df-8 12216 df-9 12217 df-n0 12404 df-dec 12610 |
| This theorem is referenced by: 631prm 17056 1259lem3 17062 2503lem2 17067 4001lem1 17070 log2ub 26917 bposlem8 27260 hgt750lem2 34788 60gcd7e1 42294 3exp7 42342 3lexlogpow5ineq1 42343 sq7 42588 resqrtvalex 43923 imsqrtvalex 43924 127prm 47882 |
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