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Theorem expp1 13717

Description: Value of a complex number raised to a nonnegative integer power plus one. Part of Definition 10-4.1 of [Gleason] p. 134. (Contributed by NM, 20-May-2005.) (Revised by Mario Carneiro, 2-Jul-2013.)

**Assertion**
Ref	Expression
expp1	⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝐴↑(𝑁 + 1)) = ((𝐴↑𝑁) · 𝐴))

**Proof of Theorem expp1**
Step	Hyp	Ref	Expression
1		elnn0 12165	. 2 ⊢ (𝑁 ∈ ℕ₀ ↔ (𝑁 ∈ ℕ ∨ 𝑁 = 0))
2		seqp1 13664	. . . . . . 7 ⊢ (𝑁 ∈ (ℤ_≥‘1) → (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · ((ℕ × {𝐴})‘(𝑁 + 1))))
3		nnuz 12550	. . . . . . 7 ⊢ ℕ = (ℤ_≥‘1)
4	2, 3	eleq2s 2857	. . . . . 6 ⊢ (𝑁 ∈ ℕ → (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · ((ℕ × {𝐴})‘(𝑁 + 1))))
5	4	adantl 481	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · ((ℕ × {𝐴})‘(𝑁 + 1))))
6		peano2nn 11915	. . . . . . 7 ⊢ (𝑁 ∈ ℕ → (𝑁 + 1) ∈ ℕ)
7		fvconst2g 7059	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → ((ℕ × {𝐴})‘(𝑁 + 1)) = 𝐴)
8	6, 7	sylan2 592	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → ((ℕ × {𝐴})‘(𝑁 + 1)) = 𝐴)
9	8	oveq2d 7271	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → ((seq1( · , (ℕ × {𝐴}))‘𝑁) · ((ℕ × {𝐴})‘(𝑁 + 1))) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · 𝐴))
10	5, 9	eqtrd 2778	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · 𝐴))
11		expnnval 13713	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ (𝑁 + 1) ∈ ℕ) → (𝐴↑(𝑁 + 1)) = (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)))
12	6, 11	sylan2 592	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (𝐴↑(𝑁 + 1)) = (seq1( · , (ℕ × {𝐴}))‘(𝑁 + 1)))
13		expnnval 13713	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (𝐴↑𝑁) = (seq1( · , (ℕ × {𝐴}))‘𝑁))
14	13	oveq1d 7270	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → ((𝐴↑𝑁) · 𝐴) = ((seq1( · , (ℕ × {𝐴}))‘𝑁) · 𝐴))
15	10, 12, 14	3eqtr4d 2788	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ) → (𝐴↑(𝑁 + 1)) = ((𝐴↑𝑁) · 𝐴))
16		exp1 13716	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴↑1) = 𝐴)
17		mulid2 10905	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴)
18	16, 17	eqtr4d 2781	. . . . 5 ⊢ (𝐴 ∈ ℂ → (𝐴↑1) = (1 · 𝐴))
19	18	adantr 480	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝐴↑1) = (1 · 𝐴))
20		simpr 484	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → 𝑁 = 0)
21	20	oveq1d 7270	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝑁 + 1) = (0 + 1))
22		0p1e1 12025	. . . . . 6 ⊢ (0 + 1) = 1
23	21, 22	eqtrdi 2795	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝑁 + 1) = 1)
24	23	oveq2d 7271	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝐴↑(𝑁 + 1)) = (𝐴↑1))
25		oveq2 7263	. . . . . 6 ⊢ (𝑁 = 0 → (𝐴↑𝑁) = (𝐴↑0))
26		exp0 13714	. . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴↑0) = 1)
27	25, 26	sylan9eqr 2801	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝐴↑𝑁) = 1)
28	27	oveq1d 7270	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → ((𝐴↑𝑁) · 𝐴) = (1 · 𝐴))
29	19, 24, 28	3eqtr4d 2788	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 = 0) → (𝐴↑(𝑁 + 1)) = ((𝐴↑𝑁) · 𝐴))
30	15, 29	jaodan 954	. 2 ⊢ ((𝐴 ∈ ℂ ∧ (𝑁 ∈ ℕ ∨ 𝑁 = 0)) → (𝐴↑(𝑁 + 1)) = ((𝐴↑𝑁) · 𝐴))
31	1, 30	sylan2b 593	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝐴↑(𝑁 + 1)) = ((𝐴↑𝑁) · 𝐴))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∨ wo 843 = wceq 1539 ∈ wcel 2108 {csn 4558 × cxp 5578 ‘cfv 6418 (class class class)co 7255 ℂcc 10800 0cc0 10802 1c1 10803 + caddc 10805 · cmul 10807 ℕcn 11903 ℕ₀cn0 12163 ℤ_≥cuz 12511 seqcseq 13649 ↑cexp 13710

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879

This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-n0 12164 df-z 12250 df-uz 12512 df-seq 13650 df-exp 13711

This theorem is referenced by: expcllem 13721 expm1t 13739 expeq0 13741 mulexp 13750 expadd 13753 expmul 13756 sqval 13763 expp1d 13793 leexp2r 13820 leexp1a 13821 cu2 13845 i3 13848 binom3 13867 bernneq 13872 modexp 13881 faclbnd 13932 faclbnd2 13933 faclbnd4lem1 13935 faclbnd6 13941 cjexp 14789 absexp 14944 binomlem 15469 climcndslem1 15489 climcndslem2 15490 pwdif 15508 geolim 15510 geo2sum 15513 efexp 15738 demoivreALT 15838 rpnnen2lem11 15861 pwp1fsum 16028 prmdvdsexp 16348 pcexp 16488 prmreclem6 16550 decexp2 16704 numexpp1 16707 2exp7 16717 cnfldexp 20543 expcn 23941 mbfi1fseqlem5 24789 dvexp 25022 aaliou3lem2 25408 tangtx 25567 cxpmul2 25749 mcubic 25902 cubic2 25903 binom4 25905 dquartlem2 25907 quart1lem 25910 quart1 25911 quartlem1 25912 log2cnv 25999 log2ublem2 26002 log2ub 26004 basellem3 26137 chtublem 26264 perfectlem1 26282 perfectlem2 26283 bclbnd 26333 bposlem8 26344 dchrisum0flblem1 26561 pntlemo 26660 qabvexp 26679 psgnfzto1st 31274 oddpwdc 32221 hgt750lem 32531 subfacval2 33049 sinccvglem 33530 heiborlem6 35901 bfplem1 35907 3lexlogpow5ineq1 39990 perfectALTVlem1 45061 perfectALTVlem2 45062 altgsumbcALT 45577

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