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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 420lcm8e840 | Structured version Visualization version GIF version | ||
| Description: The lcm of 420 and 8 is 840. (Contributed by metakunt, 25-Apr-2024.) |
| Ref | Expression |
|---|---|
| 420lcm8e840 | ⊢ (;;420 lcm 8) = ;;840 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4nn0 12649 | . . . 4 ⊢ 4 ∈ ℕ0 | |
| 2 | 2nn 12440 | . . . 4 ⊢ 2 ∈ ℕ | |
| 3 | 1, 2 | decnncl 12862 | . . 3 ⊢ ;42 ∈ ℕ |
| 4 | 3 | decnncl2 12867 | . 2 ⊢ ;;420 ∈ ℕ |
| 5 | 8nn 12462 | . 2 ⊢ 8 ∈ ℕ | |
| 6 | 4nn 12450 | . 2 ⊢ 4 ∈ ℕ | |
| 7 | 8nn0 12653 | . . . 4 ⊢ 8 ∈ ℕ0 | |
| 8 | 7, 6 | decnncl 12862 | . . 3 ⊢ ;84 ∈ ℕ |
| 9 | 8 | decnncl2 12867 | . 2 ⊢ ;;840 ∈ ℕ |
| 10 | 420gcd8e4 43247 | . 2 ⊢ (;;420 gcd 8) = 4 | |
| 11 | eqid 2763 | . 2 ⊢ (4 · ;;840) = (4 · ;;840) | |
| 12 | 4, 5 | mulcomnni 43228 | . . . . 5 ⊢ (;;420 · 8) = (8 · ;;420) |
| 13 | 4t2e8 12535 | . . . . . 6 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7450 | . . . . 5 ⊢ ((4 · 2) · ;;420) = (8 · ;;420) |
| 15 | 12, 14 | eqtr4i 2789 | . . . 4 ⊢ (;;420 · 8) = ((4 · 2) · ;;420) |
| 16 | 6, 2, 4 | mulassnni 43227 | . . . 4 ⊢ ((4 · 2) · ;;420) = (4 · (2 · ;;420)) |
| 17 | 15, 16 | eqtri 2786 | . . 3 ⊢ (;;420 · 8) = (4 · (2 · ;;420)) |
| 18 | 2 | nnnn0i 12638 | . . . . 5 ⊢ 2 ∈ ℕ0 |
| 19 | 3 | nnnn0i 12638 | . . . . 5 ⊢ ;42 ∈ ℕ0 |
| 20 | 0nn0 12645 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 21 | eqid 2763 | . . . . 5 ⊢ ;;420 = ;;420 | |
| 22 | eqid 2763 | . . . . . . 7 ⊢ ;42 = ;42 | |
| 23 | 2t4e8 12536 | . . . . . . . . 9 ⊢ (2 · 4) = 8 | |
| 24 | 23 | oveq1i 7450 | . . . . . . . 8 ⊢ ((2 · 4) + 0) = (8 + 0) |
| 25 | 8cn 12464 | . . . . . . . . 9 ⊢ 8 ∈ ℂ | |
| 26 | 25 | addridi 11521 | . . . . . . . 8 ⊢ (8 + 0) = 8 |
| 27 | 24, 26 | eqtri 2786 | . . . . . . 7 ⊢ ((2 · 4) + 0) = 8 |
| 28 | 2t2e4 12530 | . . . . . . . 8 ⊢ (2 · 2) = 4 | |
| 29 | 1 | dec0h 12865 | . . . . . . . . 9 ⊢ 4 = ;04 |
| 30 | 29 | eqcomi 2772 | . . . . . . . 8 ⊢ ;04 = 4 |
| 31 | 28, 30 | eqtr4i 2789 | . . . . . . 7 ⊢ (2 · 2) = ;04 |
| 32 | 18, 1, 18, 22, 1, 20, 27, 31 | decmul2c 12909 | . . . . . 6 ⊢ (2 · ;42) = ;84 |
| 33 | 4cn 12452 | . . . . . . 7 ⊢ 4 ∈ ℂ | |
| 34 | 33 | addridi 11521 | . . . . . 6 ⊢ (4 + 0) = 4 |
| 35 | 7, 1, 20, 32, 34 | decaddi 12903 | . . . . 5 ⊢ ((2 · ;42) + 0) = ;84 |
| 36 | 2t0e0 12537 | . . . . . 6 ⊢ (2 · 0) = 0 | |
| 37 | 20 | dec0h 12865 | . . . . . . 7 ⊢ 0 = ;00 |
| 38 | 37 | eqcomi 2772 | . . . . . 6 ⊢ ;00 = 0 |
| 39 | 36, 38 | eqtr4i 2789 | . . . . 5 ⊢ (2 · 0) = ;00 |
| 40 | 18, 19, 20, 21, 20, 20, 35, 39 | decmul2c 12909 | . . . 4 ⊢ (2 · ;;420) = ;;840 |
| 41 | 40 | oveq2i 7451 | . . 3 ⊢ (4 · (2 · ;;420)) = (4 · ;;840) |
| 42 | 17, 41 | eqtri 2786 | . 2 ⊢ (;;420 · 8) = (4 · ;;840) |
| 43 | 4, 5, 6, 9, 10, 11, 42 | lcmeprodgcdi 43248 | 1 ⊢ (;;420 lcm 8) = ;;840 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7440 0cc0 11224 + caddc 11227 · cmul 11229 2c2 12421 4c4 12423 8c8 12427 ;cdc 12838 lcm clcm 16789 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 ax-pre-sup 11302 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-er 8742 df-en 8999 df-dom 9000 df-sdom 9001 df-sup 9458 df-inf 9459 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-div 11998 df-nn 12360 df-2 12429 df-3 12430 df-4 12431 df-5 12432 df-6 12433 df-7 12434 df-8 12435 df-9 12436 df-n0 12631 df-z 12718 df-dec 12839 df-uz 12990 df-rp 13145 df-fl 13956 df-mod 14034 df-seq 14169 df-exp 14229 df-cj 15292 df-re 15293 df-im 15294 df-sqrt 15428 df-abs 15429 df-dvds 16449 df-gcd 16691 df-lcm 16791 |
| This theorem is used by: lcm8un 43261 |
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