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Mirrors > Home > MPE Home > Th. List > ex-fac | Structured version Visualization version GIF version |
Description: Example for df-fac 14237. (Contributed by AV, 4-Sep-2021.) |
Ref | Expression |
---|---|
ex-fac | ⊢ (!‘5) = ;;120 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-5 12279 | . . . 4 ⊢ 5 = (4 + 1) | |
2 | 1 | fveq2i 6887 | . . 3 ⊢ (!‘5) = (!‘(4 + 1)) |
3 | 4nn0 12492 | . . . 4 ⊢ 4 ∈ ℕ0 | |
4 | facp1 14241 | . . . 4 ⊢ (4 ∈ ℕ0 → (!‘(4 + 1)) = ((!‘4) · (4 + 1))) | |
5 | 3, 4 | ax-mp 5 | . . 3 ⊢ (!‘(4 + 1)) = ((!‘4) · (4 + 1)) |
6 | 2, 5 | eqtri 2754 | . 2 ⊢ (!‘5) = ((!‘4) · (4 + 1)) |
7 | fac4 14244 | . . . 4 ⊢ (!‘4) = ;24 | |
8 | 4p1e5 12359 | . . . 4 ⊢ (4 + 1) = 5 | |
9 | 7, 8 | oveq12i 7416 | . . 3 ⊢ ((!‘4) · (4 + 1)) = (;24 · 5) |
10 | 5nn0 12493 | . . . 4 ⊢ 5 ∈ ℕ0 | |
11 | 2nn0 12490 | . . . 4 ⊢ 2 ∈ ℕ0 | |
12 | eqid 2726 | . . . 4 ⊢ ;24 = ;24 | |
13 | 0nn0 12488 | . . . 4 ⊢ 0 ∈ ℕ0 | |
14 | 1nn0 12489 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
15 | 5cn 12301 | . . . . . 6 ⊢ 5 ∈ ℂ | |
16 | 2cn 12288 | . . . . . 6 ⊢ 2 ∈ ℂ | |
17 | 5t2e10 12778 | . . . . . 6 ⊢ (5 · 2) = ;10 | |
18 | 15, 16, 17 | mulcomli 11224 | . . . . 5 ⊢ (2 · 5) = ;10 |
19 | 16 | addlidi 11403 | . . . . 5 ⊢ (0 + 2) = 2 |
20 | 14, 13, 11, 18, 19 | decaddi 12738 | . . . 4 ⊢ ((2 · 5) + 2) = ;12 |
21 | 4cn 12298 | . . . . 5 ⊢ 4 ∈ ℂ | |
22 | 5t4e20 12780 | . . . . 5 ⊢ (5 · 4) = ;20 | |
23 | 15, 21, 22 | mulcomli 11224 | . . . 4 ⊢ (4 · 5) = ;20 |
24 | 10, 11, 3, 12, 13, 11, 20, 23 | decmul1c 12743 | . . 3 ⊢ (;24 · 5) = ;;120 |
25 | 9, 24 | eqtri 2754 | . 2 ⊢ ((!‘4) · (4 + 1)) = ;;120 |
26 | 6, 25 | eqtri 2754 | 1 ⊢ (!‘5) = ;;120 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ∈ wcel 2098 ‘cfv 6536 (class class class)co 7404 0cc0 11109 1c1 11110 + caddc 11112 · cmul 11114 2c2 12268 4c4 12270 5c5 12271 ℕ0cn0 12473 ;cdc 12678 !cfa 14236 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7852 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-er 8702 df-en 8939 df-dom 8940 df-sdom 8941 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-nn 12214 df-2 12276 df-3 12277 df-4 12278 df-5 12279 df-6 12280 df-7 12281 df-8 12282 df-9 12283 df-n0 12474 df-z 12560 df-dec 12679 df-uz 12824 df-seq 13970 df-fac 14237 |
This theorem is referenced by: (None) |
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