dvexp2 - Metamath Proof Explorer

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Theorem dvexp2 25934

Description: Derivative of an exponential, possibly zero power. (Contributed by Stefan O'Rear, 13-Nov-2014.) (Revised by Mario Carneiro, 10-Feb-2015.)

**Assertion**
Ref	Expression
dvexp2	⊢ (𝑁 ∈ ℕ₀ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))

Distinct variable group: 𝑥,𝑁

**Proof of Theorem dvexp2**
Step	Hyp	Ref	Expression
1		elnn0 12433	. 2 ⊢ (𝑁 ∈ ℕ₀ ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0))
2		dvexp 25933	. . . 4 ⊢ (𝑁 ∈ ℕ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
3		nnne0 12205	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → 𝑁 ≠ 0)
4	3	neneqd 2938	. . . . . 6 ⊢ (𝑁 ∈ ℕ → ¬ 𝑁 = 0)
5	4	iffalsed 4478	. . . . 5 ⊢ (𝑁 ∈ ℕ → if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))) = (𝑁 · (𝑥↑(𝑁 − 1))))
6	5	mpteq2dv 5180	. . . 4 ⊢ (𝑁 ∈ ℕ → (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))) = (𝑥 ∈ ℂ ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
7	2, 6	eqtr4d 2775	. . 3 ⊢ (𝑁 ∈ ℕ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
8		oveq2 7369	. . . . . . . . . 10 ⊢ (𝑁 = 0 → (𝑥↑𝑁) = (𝑥↑0))
9		exp0 14021	. . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → (𝑥↑0) = 1)
10	8, 9	sylan9eq 2792	. . . . . . . . 9 ⊢ ((𝑁 = 0 ∧ 𝑥 ∈ ℂ) → (𝑥↑𝑁) = 1)
11	10	mpteq2dva 5179	. . . . . . . 8 ⊢ (𝑁 = 0 → (𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) = (𝑥 ∈ ℂ ↦ 1))
12		fconstmpt 5687	. . . . . . . 8 ⊢ (ℂ × {1}) = (𝑥 ∈ ℂ ↦ 1)
13	11, 12	eqtr4di 2790	. . . . . . 7 ⊢ (𝑁 = 0 → (𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) = (ℂ × {1}))
14	13	oveq2d 7377	. . . . . 6 ⊢ (𝑁 = 0 → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (ℂ D (ℂ × {1})))
15		ax-1cn 11090	. . . . . . 7 ⊢ 1 ∈ ℂ
16		dvconst 25897	. . . . . . 7 ⊢ (1 ∈ ℂ → (ℂ D (ℂ × {1})) = (ℂ × {0}))
17	15, 16	ax-mp 5	. . . . . 6 ⊢ (ℂ D (ℂ × {1})) = (ℂ × {0})
18	14, 17	eqtrdi 2788	. . . . 5 ⊢ (𝑁 = 0 → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (ℂ × {0}))
19		fconstmpt 5687	. . . . 5 ⊢ (ℂ × {0}) = (𝑥 ∈ ℂ ↦ 0)
20	18, 19	eqtrdi 2788	. . . 4 ⊢ (𝑁 = 0 → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ 0))
21		iftrue 4473	. . . . 5 ⊢ (𝑁 = 0 → if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))) = 0)
22	21	mpteq2dv 5180	. . . 4 ⊢ (𝑁 = 0 → (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))) = (𝑥 ∈ ℂ ↦ 0))
23	20, 22	eqtr4d 2775	. . 3 ⊢ (𝑁 = 0 → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
24	7, 23	jaoi 858	. 2 ⊢ ((𝑁 ∈ ℕ ∨ 𝑁 = 0) → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
25	1, 24	sylbi 217	1 ⊢ (𝑁 ∈ ℕ₀ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∨ wo 848 = wceq 1542 ∈ wcel 2114 ifcif 4467 {csn 4568 ↦ cmpt 5167 × cxp 5623 (class class class)co 7361 ℂcc 11030 0cc0 11032 1c1 11033 · cmul 11037 − cmin 11371 ℕcn 12168 ℕ₀cn0 12431 ↑cexp 14017 D cdv 25843

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-pre-mulgt0 11109 ax-pre-sup 11110 ax-addf 11111

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-of 7625 df-om 7812 df-1st 7936 df-2nd 7937 df-supp 8105 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-er 8637 df-map 8769 df-pm 8770 df-ixp 8840 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-fsupp 9269 df-fi 9318 df-sup 9349 df-inf 9350 df-oi 9419 df-card 9857 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 df-sub 11373 df-neg 11374 df-div 11802 df-nn 12169 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 df-9 12245 df-n0 12432 df-z 12519 df-dec 12639 df-uz 12783 df-q 12893 df-rp 12937 df-xneg 13057 df-xadd 13058 df-xmul 13059 df-icc 13299 df-fz 13456 df-fzo 13603 df-seq 13958 df-exp 14018 df-hash 14287 df-cj 15055 df-re 15056 df-im 15057 df-sqrt 15191 df-abs 15192 df-struct 17111 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 df-plusg 17227 df-mulr 17228 df-starv 17229 df-sca 17230 df-vsca 17231 df-ip 17232 df-tset 17233 df-ple 17234 df-ds 17236 df-unif 17237 df-hom 17238 df-cco 17239 df-rest 17379 df-topn 17380 df-0g 17398 df-gsum 17399 df-topgen 17400 df-pt 17401 df-prds 17404 df-xrs 17460 df-qtop 17465 df-imas 17466 df-xps 17468 df-mre 17542 df-mrc 17543 df-acs 17545 df-mgm 18602 df-sgrp 18681 df-mnd 18697 df-submnd 18746 df-mulg 19038 df-cntz 19286 df-cmn 19751 df-psmet 21339 df-xmet 21340 df-met 21341 df-bl 21342 df-mopn 21343 df-fbas 21344 df-fg 21345 df-cnfld 21348 df-top 22872 df-topon 22889 df-topsp 22911 df-bases 22924 df-cld 22997 df-ntr 22998 df-cls 22999 df-nei 23076 df-lp 23114 df-perf 23115 df-cn 23205 df-cnp 23206 df-haus 23293 df-tx 23540 df-hmeo 23733 df-fil 23824 df-fm 23916 df-flim 23917 df-flf 23918 df-xms 24298 df-ms 24299 df-tms 24300 df-cncf 24858 df-limc 25846 df-dv 25847

This theorem is referenced by: dvexp3 25958 dvply1 26263 dvtaylp 26350 pserdvlem2 26409

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