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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 12550 | . . . 4 ⊢ 4 ∈ ℕ0 | |
| 2 | 2nn 12341 | . . . 4 ⊢ 2 ∈ ℕ | |
| 3 | 1, 2 | decnncl 12763 | . . 3 ⊢ ;42 ∈ ℕ |
| 4 | 3 | decnncl2 12768 | . 2 ⊢ ;;420 ∈ ℕ |
| 5 | 8nn 12363 | . 2 ⊢ 8 ∈ ℕ | |
| 6 | 4nn 12351 | . 2 ⊢ 4 ∈ ℕ | |
| 7 | 8nn0 12554 | . . . 4 ⊢ 8 ∈ ℕ0 | |
| 8 | 7, 6 | decnncl 12763 | . . 3 ⊢ ;84 ∈ ℕ |
| 9 | 8 | decnncl2 12768 | . 2 ⊢ ;;840 ∈ ℕ |
| 10 | 420gcd8e4 42859 | . 2 ⊢ (;;420 gcd 8) = 4 | |
| 11 | eqid 2762 | . 2 ⊢ (4 · ;;840) = (4 · ;;840) | |
| 12 | 4, 5 | mulcomnni 42840 | . . . . 5 ⊢ (;;420 · 8) = (8 · ;;420) |
| 13 | 4t2e8 12436 | . . . . . 6 ⊢ (4 · 2) = 8 | |
| 14 | 13 | oveq1i 7426 | . . . . 5 ⊢ ((4 · 2) · ;;420) = (8 · ;;420) |
| 15 | 12, 14 | eqtr4i 2788 | . . . 4 ⊢ (;;420 · 8) = ((4 · 2) · ;;420) |
| 16 | 6, 2, 4 | mulassnni 42839 | . . . 4 ⊢ ((4 · 2) · ;;420) = (4 · (2 · ;;420)) |
| 17 | 15, 16 | eqtri 2785 | . . 3 ⊢ (;;420 · 8) = (4 · (2 · ;;420)) |
| 18 | 2 | nnnn0i 12539 | . . . . 5 ⊢ 2 ∈ ℕ0 |
| 19 | 3 | nnnn0i 12539 | . . . . 5 ⊢ ;42 ∈ ℕ0 |
| 20 | 0nn0 12546 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 21 | eqid 2762 | . . . . 5 ⊢ ;;420 = ;;420 | |
| 22 | eqid 2762 | . . . . . . 7 ⊢ ;42 = ;42 | |
| 23 | 2t4e8 12437 | . . . . . . . . 9 ⊢ (2 · 4) = 8 | |
| 24 | 23 | oveq1i 7426 | . . . . . . . 8 ⊢ ((2 · 4) + 0) = (8 + 0) |
| 25 | 8cn 12365 | . . . . . . . . 9 ⊢ 8 ∈ ℂ | |
| 26 | 25 | addridi 11424 | . . . . . . . 8 ⊢ (8 + 0) = 8 |
| 27 | 24, 26 | eqtri 2785 | . . . . . . 7 ⊢ ((2 · 4) + 0) = 8 |
| 28 | 2t2e4 12431 | . . . . . . . 8 ⊢ (2 · 2) = 4 | |
| 29 | 1 | dec0h 12766 | . . . . . . . . 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 12810 | . . . . . 6 ⊢ (2 · ;42) = ;84 |
| 33 | 4cn 12353 | . . . . . . 7 ⊢ 4 ∈ ℂ | |
| 34 | 33 | addridi 11424 | . . . . . 6 ⊢ (4 + 0) = 4 |
| 35 | 7, 1, 20, 32, 34 | decaddi 12804 | . . . . 5 ⊢ ((2 · ;42) + 0) = ;84 |
| 36 | 2t0e0 12438 | . . . . . 6 ⊢ (2 · 0) = 0 | |
| 37 | 20 | dec0h 12766 | . . . . . . 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 12810 | . . . 4 ⊢ (2 · ;;420) = ;;840 |
| 41 | 40 | oveq2i 7427 | . . 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 42860 | 1 ⊢ (;;420 lcm 8) = ;;840 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 (class class class)co 7416 0cc0 11127 + caddc 11130 · cmul 11132 2c2 12322 4c4 12324 8c8 12328 ;cdc 12739 lcm clcm 16682 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7739 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 ax-pre-sup 11205 |
| 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 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 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7866 df-2nd 7990 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8699 df-en 8956 df-dom 8957 df-sdom 8958 df-sup 9415 df-inf 9416 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-div 11899 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-dec 12740 df-uz 12891 df-rp 13045 df-fl 13855 df-mod 13933 df-seq 14068 df-exp 14128 df-cj 15188 df-re 15189 df-im 15190 df-sqrt 15324 df-abs 15325 df-dvds 16347 df-gcd 16589 df-lcm 16684 |
| This theorem is used by: lcm8un 42873 |
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