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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 12594 | . . . 4 ⊢ 4 ∈ ℕ0 | |
| 2 | 2nn 12385 | . . . 4 ⊢ 2 ∈ ℕ | |
| 3 | 1, 2 | decnncl 12807 | . . 3 ⊢ ;42 ∈ ℕ |
| 4 | 3 | decnncl2 12812 | . 2 ⊢ ;;420 ∈ ℕ |
| 5 | 8nn 12407 | . 2 ⊢ 8 ∈ ℕ | |
| 6 | 4nn 12395 | . 2 ⊢ 4 ∈ ℕ | |
| 7 | 8nn0 12598 | . . . 4 ⊢ 8 ∈ ℕ0 | |
| 8 | 7, 6 | decnncl 12807 | . . 3 ⊢ ;84 ∈ ℕ |
| 9 | 8 | decnncl2 12812 | . 2 ⊢ ;;840 ∈ ℕ |
| 10 | 420gcd8e4 42976 | . 2 ⊢ (;;420 gcd 8) = 4 | |
| 11 | eqid 2760 | . 2 ⊢ (4 · ;;840) = (4 · ;;840) | |
| 12 | 4, 5 | mulcomnni 42957 | . . . . 5 ⊢ (;;420 · 8) = (8 · ;;420) |
| 13 | 4t2e8 12480 | . . . . . 6 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7418 | . . . . 5 ⊢ ((4 · 2) · ;;420) = (8 · ;;420) |
| 15 | 12, 14 | eqtr4i 2786 | . . . 4 ⊢ (;;420 · 8) = ((4 · 2) · ;;420) |
| 16 | 6, 2, 4 | mulassnni 42956 | . . . 4 ⊢ ((4 · 2) · ;;420) = (4 · (2 · ;;420)) |
| 17 | 15, 16 | eqtri 2783 | . . 3 ⊢ (;;420 · 8) = (4 · (2 · ;;420)) |
| 18 | 2 | nnnn0i 12583 | . . . . 5 ⊢ 2 ∈ ℕ0 |
| 19 | 3 | nnnn0i 12583 | . . . . 5 ⊢ ;42 ∈ ℕ0 |
| 20 | 0nn0 12590 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 21 | eqid 2760 | . . . . 5 ⊢ ;;420 = ;;420 | |
| 22 | eqid 2760 | . . . . . . 7 ⊢ ;42 = ;42 | |
| 23 | 2t4e8 12481 | . . . . . . . . 9 ⊢ (2 · 4) = 8 | |
| 24 | 23 | oveq1i 7418 | . . . . . . . 8 ⊢ ((2 · 4) + 0) = (8 + 0) |
| 25 | 8cn 12409 | . . . . . . . . 9 ⊢ 8 ∈ ℂ | |
| 26 | 25 | addridi 11468 | . . . . . . . 8 ⊢ (8 + 0) = 8 |
| 27 | 24, 26 | eqtri 2783 | . . . . . . 7 ⊢ ((2 · 4) + 0) = 8 |
| 28 | 2t2e4 12475 | . . . . . . . 8 ⊢ (2 · 2) = 4 | |
| 29 | 1 | dec0h 12810 | . . . . . . . . 9 ⊢ 4 = ;04 |
| 30 | 29 | eqcomi 2769 | . . . . . . . 8 ⊢ ;04 = 4 |
| 31 | 28, 30 | eqtr4i 2786 | . . . . . . 7 ⊢ (2 · 2) = ;04 |
| 32 | 18, 1, 18, 22, 1, 20, 27, 31 | decmul2c 12854 | . . . . . 6 ⊢ (2 · ;42) = ;84 |
| 33 | 4cn 12397 | . . . . . . 7 ⊢ 4 ∈ ℂ | |
| 34 | 33 | addridi 11468 | . . . . . 6 ⊢ (4 + 0) = 4 |
| 35 | 7, 1, 20, 32, 34 | decaddi 12848 | . . . . 5 ⊢ ((2 · ;42) + 0) = ;84 |
| 36 | 2t0e0 12482 | . . . . . 6 ⊢ (2 · 0) = 0 | |
| 37 | 20 | dec0h 12810 | . . . . . . 7 ⊢ 0 = ;00 |
| 38 | 37 | eqcomi 2769 | . . . . . 6 ⊢ ;00 = 0 |
| 39 | 36, 38 | eqtr4i 2786 | . . . . 5 ⊢ (2 · 0) = ;00 |
| 40 | 18, 19, 20, 21, 20, 20, 35, 39 | decmul2c 12854 | . . . 4 ⊢ (2 · ;;420) = ;;840 |
| 41 | 40 | oveq2i 7419 | . . 3 ⊢ (4 · (2 · ;;420)) = (4 · ;;840) |
| 42 | 17, 41 | eqtri 2783 | . 2 ⊢ (;;420 · 8) = (4 · ;;840) |
| 43 | 4, 5, 6, 9, 10, 11, 42 | lcmeprodgcdi 42977 | 1 ⊢ (;;420 lcm 8) = ;;840 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7408 0cc0 11171 + caddc 11174 · cmul 11176 2c2 12366 4c4 12368 8c8 12372 ;cdc 12783 lcm clcm 16725 |
| 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-cnex 11227 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 ax-pre-mulgt0 11248 ax-pre-sup 11249 |
| 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-rmo 3365 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-sup 9412 df-inf 9413 df-pnf 11316 df-mnf 11317 df-xr 11318 df-ltxr 11319 df-le 11320 df-sub 11514 df-neg 11515 df-div 11943 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-z 12663 df-dec 12784 df-uz 12935 df-rp 13090 df-fl 13900 df-mod 13978 df-seq 14113 df-exp 14173 df-cj 15233 df-re 15234 df-im 15235 df-sqrt 15369 df-abs 15370 df-dvds 16390 df-gcd 16632 df-lcm 16727 |
| This theorem is used by: lcm8un 42990 |
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