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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 12529 | . . . 4 ⊢ 4 ∈ ℕ0 | |
| 2 | 2nn 12320 | . . . 4 ⊢ 2 ∈ ℕ | |
| 3 | 1, 2 | decnncl 12741 | . . 3 ⊢ ;42 ∈ ℕ |
| 4 | 3 | decnncl2 12746 | . 2 ⊢ ;;420 ∈ ℕ |
| 5 | 8nn 12342 | . 2 ⊢ 8 ∈ ℕ | |
| 6 | 4nn 12330 | . 2 ⊢ 4 ∈ ℕ | |
| 7 | 8nn0 12533 | . . . 4 ⊢ 8 ∈ ℕ0 | |
| 8 | 7, 6 | decnncl 12741 | . . 3 ⊢ ;84 ∈ ℕ |
| 9 | 8 | decnncl2 12746 | . 2 ⊢ ;;840 ∈ ℕ |
| 10 | 420gcd8e4 42801 | . 2 ⊢ (;;420 gcd 8) = 4 | |
| 11 | eqid 2762 | . 2 ⊢ (4 · ;;840) = (4 · ;;840) | |
| 12 | 4, 5 | mulcomnni 42782 | . . . . 5 ⊢ (;;420 · 8) = (8 · ;;420) |
| 13 | 4t2e8 12415 | . . . . . 6 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7422 | . . . . 5 ⊢ ((4 · 2) · ;;420) = (8 · ;;420) |
| 15 | 12, 14 | eqtr4i 2788 | . . . 4 ⊢ (;;420 · 8) = ((4 · 2) · ;;420) |
| 16 | 6, 2, 4 | mulassnni 42781 | . . . 4 ⊢ ((4 · 2) · ;;420) = (4 · (2 · ;;420)) |
| 17 | 15, 16 | eqtri 2785 | . . 3 ⊢ (;;420 · 8) = (4 · (2 · ;;420)) |
| 18 | 2 | nnnn0i 12518 | . . . . 5 ⊢ 2 ∈ ℕ0 |
| 19 | 3 | nnnn0i 12518 | . . . . 5 ⊢ ;42 ∈ ℕ0 |
| 20 | 0nn0 12525 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 21 | eqid 2762 | . . . . 5 ⊢ ;;420 = ;;420 | |
| 22 | eqid 2762 | . . . . . . 7 ⊢ ;42 = ;42 | |
| 23 | 2t4e8 12416 | . . . . . . . . 9 ⊢ (2 · 4) = 8 | |
| 24 | 23 | oveq1i 7422 | . . . . . . . 8 ⊢ ((2 · 4) + 0) = (8 + 0) |
| 25 | 8cn 12344 | . . . . . . . . 9 ⊢ 8 ∈ ℂ | |
| 26 | 25 | addridi 11403 | . . . . . . . 8 ⊢ (8 + 0) = 8 |
| 27 | 24, 26 | eqtri 2785 | . . . . . . 7 ⊢ ((2 · 4) + 0) = 8 |
| 28 | 2t2e4 12410 | . . . . . . . 8 ⊢ (2 · 2) = 4 | |
| 29 | 1 | dec0h 12744 | . . . . . . . . 9 ⊢ 4 = ;04 |
| 30 | 29 | eqcomi 2771 | . . . . . . . 8 ⊢ ;04 = 4 |
| 31 | 28, 30 | eqtr4i 2788 | . . . . . . 7 ⊢ (2 · 2) = ;04 |
| 32 | 18, 1, 18, 22, 1, 20, 27, 31 | decmul2c 12788 | . . . . . 6 ⊢ (2 · ;42) = ;84 |
| 33 | 4cn 12332 | . . . . . . 7 ⊢ 4 ∈ ℂ | |
| 34 | 33 | addridi 11403 | . . . . . 6 ⊢ (4 + 0) = 4 |
| 35 | 7, 1, 20, 32, 34 | decaddi 12782 | . . . . 5 ⊢ ((2 · ;42) + 0) = ;84 |
| 36 | 2t0e0 12417 | . . . . . 6 ⊢ (2 · 0) = 0 | |
| 37 | 20 | dec0h 12744 | . . . . . . 7 ⊢ 0 = ;00 |
| 38 | 37 | eqcomi 2771 | . . . . . 6 ⊢ ;00 = 0 |
| 39 | 36, 38 | eqtr4i 2788 | . . . . 5 ⊢ (2 · 0) = ;00 |
| 40 | 18, 19, 20, 21, 20, 20, 35, 39 | decmul2c 12788 | . . . 4 ⊢ (2 · ;;420) = ;;840 |
| 41 | 40 | oveq2i 7423 | . . 3 ⊢ (4 · (2 · ;;420)) = (4 · ;;840) |
| 42 | 17, 41 | eqtri 2785 | . 2 ⊢ (;;420 · 8) = (4 · ;;840) |
| 43 | 4, 5, 6, 9, 10, 11, 42 | lcmeprodgcdi 42802 | 1 ⊢ (;;420 lcm 8) = ;;840 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 (class class class)co 7412 0cc0 11106 + caddc 11109 · cmul 11111 2c2 12301 4c4 12303 8c8 12307 ;cdc 12717 lcm clcm 16652 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 ax-pre-sup 11184 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7861 df-2nd 7985 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-er 8692 df-en 8942 df-dom 8943 df-sdom 8944 df-sup 9400 df-inf 9401 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-div 11878 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-9 12316 df-n0 12511 df-z 12598 df-dec 12718 df-uz 12869 df-rp 13023 df-fl 13832 df-mod 13910 df-seq 14045 df-exp 14105 df-cj 15157 df-re 15158 df-im 15159 df-sqrt 15293 df-abs 15294 df-dvds 16317 df-gcd 16559 df-lcm 16654 |
| This theorem is used by: lcm8un 42815 |
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