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Theorem dvexp3 25882

Description: Derivative of an exponential of integer exponent. (Contributed by Mario Carneiro, 26-Feb-2015.)

**Assertion**
Ref	Expression
dvexp3	⊢ (𝑁 ∈ ℤ → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))

Distinct variable group: 𝑥,𝑁

Proof of Theorem dvexp3 Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elznn0nn 12543	. 2 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)))
2		cnelprrecn 11161	. . . . . 6 ⊢ ℂ ∈ {ℝ, ℂ}
3	2	a1i 11	. . . . 5 ⊢ (𝑁 ∈ ℕ₀ → ℂ ∈ {ℝ, ℂ})
4		expcl 14044	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ∧ 𝑁 ∈ ℕ₀) → (𝑥↑𝑁) ∈ ℂ)
5	4	ancoms 458	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ ℂ) → (𝑥↑𝑁) ∈ ℂ)
6		c0ex 11168	. . . . . . 7 ⊢ 0 ∈ V
7		ovex 7420	. . . . . . 7 ⊢ (𝑁 · (𝑥↑(𝑁 − 1))) ∈ V
8	6, 7	ifex 4539	. . . . . 6 ⊢ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))) ∈ V
9	8	a1i 11	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ ℂ) → if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))) ∈ V)
10		dvexp2 25858	. . . . 5 ⊢ (𝑁 ∈ ℕ₀ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑𝑁))) = (𝑥 ∈ ℂ ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
11		difssd 4100	. . . . 5 ⊢ (𝑁 ∈ ℕ₀ → (ℂ ∖ {0}) ⊆ ℂ)
12		eqid 2729	. . . . . . 7 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
13	12	cnfldtopon 24670	. . . . . 6 ⊢ (TopOpen‘ℂ_fld) ∈ (TopOn‘ℂ)
14	13	toponrestid 22808	. . . . 5 ⊢ (TopOpen‘ℂ_fld) = ((TopOpen‘ℂ_fld) ↾_t ℂ)
15		cnn0opn 24675	. . . . . 6 ⊢ (ℂ ∖ {0}) ∈ (TopOpen‘ℂ_fld)
16	15	a1i 11	. . . . 5 ⊢ (𝑁 ∈ ℕ₀ → (ℂ ∖ {0}) ∈ (TopOpen‘ℂ_fld))
17	3, 5, 9, 10, 11, 14, 12, 16	dvmptres 25867	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
18		ifid 4529	. . . . . 6 ⊢ if(𝑁 = 0, (𝑁 · (𝑥↑(𝑁 − 1))), (𝑁 · (𝑥↑(𝑁 − 1)))) = (𝑁 · (𝑥↑(𝑁 − 1)))
19		id 22	. . . . . . . . 9 ⊢ (𝑁 = 0 → 𝑁 = 0)
20		oveq1 7394	. . . . . . . . . 10 ⊢ (𝑁 = 0 → (𝑁 − 1) = (0 − 1))
21	20	oveq2d 7403	. . . . . . . . 9 ⊢ (𝑁 = 0 → (𝑥↑(𝑁 − 1)) = (𝑥↑(0 − 1)))
22	19, 21	oveq12d 7405	. . . . . . . 8 ⊢ (𝑁 = 0 → (𝑁 · (𝑥↑(𝑁 − 1))) = (0 · (𝑥↑(0 − 1))))
23		eldifsn 4750	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (ℂ ∖ {0}) ↔ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0))
24		0z 12540	. . . . . . . . . . . . 13 ⊢ 0 ∈ ℤ
25		peano2zm 12576	. . . . . . . . . . . . 13 ⊢ (0 ∈ ℤ → (0 − 1) ∈ ℤ)
26	24, 25	ax-mp 5	. . . . . . . . . . . 12 ⊢ (0 − 1) ∈ ℤ
27		expclz 14049	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0 ∧ (0 − 1) ∈ ℤ) → (𝑥↑(0 − 1)) ∈ ℂ)
28	26, 27	mp3an3 1452	. . . . . . . . . . 11 ⊢ ((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) → (𝑥↑(0 − 1)) ∈ ℂ)
29	23, 28	sylbi 217	. . . . . . . . . 10 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → (𝑥↑(0 − 1)) ∈ ℂ)
30	29	adantl 481	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑(0 − 1)) ∈ ℂ)
31	30	mul02d 11372	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ (ℂ ∖ {0})) → (0 · (𝑥↑(0 − 1))) = 0)
32	22, 31	sylan9eqr 2786	. . . . . . 7 ⊢ (((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ (ℂ ∖ {0})) ∧ 𝑁 = 0) → (𝑁 · (𝑥↑(𝑁 − 1))) = 0)
33	32	ifeq1da 4520	. . . . . 6 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ (ℂ ∖ {0})) → if(𝑁 = 0, (𝑁 · (𝑥↑(𝑁 − 1))), (𝑁 · (𝑥↑(𝑁 − 1)))) = if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))))
34	18, 33	eqtr3id 2778	. . . . 5 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑁 · (𝑥↑(𝑁 − 1))) = if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1)))))
35	34	mpteq2dva 5200	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ if(𝑁 = 0, 0, (𝑁 · (𝑥↑(𝑁 − 1))))))
36	17, 35	eqtr4d 2767	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
37		eldifi 4094	. . . . . . . 8 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → 𝑥 ∈ ℂ)
38	37	adantl 481	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 𝑥 ∈ ℂ)
39		simpll 766	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 𝑁 ∈ ℝ)
40	39	recnd 11202	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 𝑁 ∈ ℂ)
41		nnnn0 12449	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℕ₀)
42	41	ad2antlr 727	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → -𝑁 ∈ ℕ₀)
43		expneg2 14035	. . . . . . 7 ⊢ ((𝑥 ∈ ℂ ∧ 𝑁 ∈ ℂ ∧ -𝑁 ∈ ℕ₀) → (𝑥↑𝑁) = (1 / (𝑥↑-𝑁)))
44	38, 40, 42, 43	syl3anc 1373	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑𝑁) = (1 / (𝑥↑-𝑁)))
45	44	mpteq2dva 5200	. . . . 5 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁)) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (1 / (𝑥↑-𝑁))))
46	45	oveq2d 7403	. . . 4 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (1 / (𝑥↑-𝑁)))))
47	2	a1i 11	. . . . 5 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → ℂ ∈ {ℝ, ℂ})
48		eldifsni 4754	. . . . . . . 8 ⊢ (𝑥 ∈ (ℂ ∖ {0}) → 𝑥 ≠ 0)
49	48	adantl 481	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 𝑥 ≠ 0)
50		nnz 12550	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℤ)
51	50	ad2antlr 727	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → -𝑁 ∈ ℤ)
52	38, 49, 51	expclzd 14116	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑-𝑁) ∈ ℂ)
53	38, 49, 51	expne0d 14117	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑-𝑁) ≠ 0)
54		eldifsn 4750	. . . . . 6 ⊢ ((𝑥↑-𝑁) ∈ (ℂ ∖ {0}) ↔ ((𝑥↑-𝑁) ∈ ℂ ∧ (𝑥↑-𝑁) ≠ 0))
55	52, 53, 54	sylanbrc 583	. . . . 5 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑-𝑁) ∈ (ℂ ∖ {0}))
56		ovex 7420	. . . . . 6 ⊢ (-𝑁 · (𝑥↑(-𝑁 − 1))) ∈ V
57	56	a1i 11	. . . . 5 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · (𝑥↑(-𝑁 − 1))) ∈ V)
58		simpr 484	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑦 ∈ (ℂ ∖ {0})) → 𝑦 ∈ (ℂ ∖ {0}))
59		eldifsn 4750	. . . . . . 7 ⊢ (𝑦 ∈ (ℂ ∖ {0}) ↔ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0))
60	58, 59	sylib 218	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0))
61		reccl 11844	. . . . . 6 ⊢ ((𝑦 ∈ ℂ ∧ 𝑦 ≠ 0) → (1 / 𝑦) ∈ ℂ)
62	60, 61	syl 17	. . . . 5 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (1 / 𝑦) ∈ ℂ)
63		negex 11419	. . . . . 6 ⊢ -(1 / (𝑦↑2)) ∈ V
64	63	a1i 11	. . . . 5 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑦 ∈ (ℂ ∖ {0})) → -(1 / (𝑦↑2)) ∈ V)
65		simpr 484	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ ℂ) → 𝑥 ∈ ℂ)
66	41	ad2antlr 727	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ ℂ) → -𝑁 ∈ ℕ₀)
67	65, 66	expcld 14111	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ ℂ) → (𝑥↑-𝑁) ∈ ℂ)
68	56	a1i 11	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ ℂ) → (-𝑁 · (𝑥↑(-𝑁 − 1))) ∈ V)
69		dvexp 25857	. . . . . . 7 ⊢ (-𝑁 ∈ ℕ → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑-𝑁))) = (𝑥 ∈ ℂ ↦ (-𝑁 · (𝑥↑(-𝑁 − 1)))))
70	69	adantl 481	. . . . . 6 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑥 ∈ ℂ ↦ (𝑥↑-𝑁))) = (𝑥 ∈ ℂ ↦ (-𝑁 · (𝑥↑(-𝑁 − 1)))))
71		difssd 4100	. . . . . 6 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ ∖ {0}) ⊆ ℂ)
72	15	a1i 11	. . . . . 6 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ ∖ {0}) ∈ (TopOpen‘ℂ_fld))
73	47, 67, 68, 70, 71, 14, 12, 72	dvmptres 25867	. . . . 5 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑-𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (-𝑁 · (𝑥↑(-𝑁 − 1)))))
74		ax-1cn 11126	. . . . . 6 ⊢ 1 ∈ ℂ
75		dvrec 25859	. . . . . 6 ⊢ (1 ∈ ℂ → (ℂ D (𝑦 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑦))) = (𝑦 ∈ (ℂ ∖ {0}) ↦ -(1 / (𝑦↑2))))
76	74, 75	mp1i 13	. . . . 5 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑦 ∈ (ℂ ∖ {0}) ↦ (1 / 𝑦))) = (𝑦 ∈ (ℂ ∖ {0}) ↦ -(1 / (𝑦↑2))))
77		oveq2 7395	. . . . 5 ⊢ (𝑦 = (𝑥↑-𝑁) → (1 / 𝑦) = (1 / (𝑥↑-𝑁)))
78		oveq1 7394	. . . . . . 7 ⊢ (𝑦 = (𝑥↑-𝑁) → (𝑦↑2) = ((𝑥↑-𝑁)↑2))
79	78	oveq2d 7403	. . . . . 6 ⊢ (𝑦 = (𝑥↑-𝑁) → (1 / (𝑦↑2)) = (1 / ((𝑥↑-𝑁)↑2)))
80	79	negeqd 11415	. . . . 5 ⊢ (𝑦 = (𝑥↑-𝑁) → -(1 / (𝑦↑2)) = -(1 / ((𝑥↑-𝑁)↑2)))
81	47, 47, 55, 57, 62, 64, 73, 76, 77, 80	dvmptco 25876	. . . 4 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (1 / (𝑥↑-𝑁)))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (-(1 / ((𝑥↑-𝑁)↑2)) · (-𝑁 · (𝑥↑(-𝑁 − 1))))))
82		2z 12565	. . . . . . . . . . . 12 ⊢ 2 ∈ ℤ
83	82	a1i 11	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 2 ∈ ℤ)
84		expmulz 14073	. . . . . . . . . . 11 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (-𝑁 ∈ ℤ ∧ 2 ∈ ℤ)) → (𝑥↑(-𝑁 · 2)) = ((𝑥↑-𝑁)↑2))
85	38, 49, 51, 83, 84	syl22anc 838	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑(-𝑁 · 2)) = ((𝑥↑-𝑁)↑2))
86	85	eqcomd 2735	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((𝑥↑-𝑁)↑2) = (𝑥↑(-𝑁 · 2)))
87	86	oveq2d 7403	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (1 / ((𝑥↑-𝑁)↑2)) = (1 / (𝑥↑(-𝑁 · 2))))
88	87	negeqd 11415	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → -(1 / ((𝑥↑-𝑁)↑2)) = -(1 / (𝑥↑(-𝑁 · 2))))
89		peano2zm 12576	. . . . . . . . . 10 ⊢ (-𝑁 ∈ ℤ → (-𝑁 − 1) ∈ ℤ)
90	51, 89	syl 17	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 − 1) ∈ ℤ)
91	38, 49, 90	expclzd 14116	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑(-𝑁 − 1)) ∈ ℂ)
92	40, 91	mulneg1d 11631	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · (𝑥↑(-𝑁 − 1))) = -(𝑁 · (𝑥↑(-𝑁 − 1))))
93	88, 92	oveq12d 7405	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-(1 / ((𝑥↑-𝑁)↑2)) · (-𝑁 · (𝑥↑(-𝑁 − 1)))) = (-(1 / (𝑥↑(-𝑁 · 2))) · -(𝑁 · (𝑥↑(-𝑁 − 1)))))
94		zmulcl 12582	. . . . . . . . . 10 ⊢ ((-𝑁 ∈ ℤ ∧ 2 ∈ ℤ) → (-𝑁 · 2) ∈ ℤ)
95	51, 82, 94	sylancl 586	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · 2) ∈ ℤ)
96	38, 49, 95	expclzd 14116	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑(-𝑁 · 2)) ∈ ℂ)
97	38, 49, 95	expne0d 14117	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑(-𝑁 · 2)) ≠ 0)
98	96, 97	reccld 11951	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (1 / (𝑥↑(-𝑁 · 2))) ∈ ℂ)
99	40, 91	mulcld 11194	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑁 · (𝑥↑(-𝑁 − 1))) ∈ ℂ)
100	98, 99	mul2negd 11633	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-(1 / (𝑥↑(-𝑁 · 2))) · -(𝑁 · (𝑥↑(-𝑁 − 1)))) = ((1 / (𝑥↑(-𝑁 · 2))) · (𝑁 · (𝑥↑(-𝑁 − 1)))))
101	98, 40, 91	mul12d 11383	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((1 / (𝑥↑(-𝑁 · 2))) · (𝑁 · (𝑥↑(-𝑁 − 1)))) = (𝑁 · ((1 / (𝑥↑(-𝑁 · 2))) · (𝑥↑(-𝑁 − 1)))))
102	38, 49, 95, 90	expsubd 14122	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑((-𝑁 − 1) − (-𝑁 · 2))) = ((𝑥↑(-𝑁 − 1)) / (𝑥↑(-𝑁 · 2))))
103		nncn 12194	. . . . . . . . . . . . 13 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℂ)
104	103	ad2antlr 727	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → -𝑁 ∈ ℂ)
105	74	a1i 11	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → 1 ∈ ℂ)
106	95	zcnd 12639	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · 2) ∈ ℂ)
107	104, 105, 106	sub32d 11565	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((-𝑁 − 1) − (-𝑁 · 2)) = ((-𝑁 − (-𝑁 · 2)) − 1))
108	104	times2d 12426	. . . . . . . . . . . . . . 15 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · 2) = (-𝑁 + -𝑁))
109	104, 40	negsubd 11539	. . . . . . . . . . . . . . 15 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 + -𝑁) = (-𝑁 − 𝑁))
110	108, 109	eqtrd 2764	. . . . . . . . . . . . . 14 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 · 2) = (-𝑁 − 𝑁))
111	110	oveq2d 7403	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 − (-𝑁 · 2)) = (-𝑁 − (-𝑁 − 𝑁)))
112	104, 40	nncand 11538	. . . . . . . . . . . . 13 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 − (-𝑁 − 𝑁)) = 𝑁)
113	111, 112	eqtrd 2764	. . . . . . . . . . . 12 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-𝑁 − (-𝑁 · 2)) = 𝑁)
114	113	oveq1d 7402	. . . . . . . . . . 11 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((-𝑁 − (-𝑁 · 2)) − 1) = (𝑁 − 1))
115	107, 114	eqtrd 2764	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((-𝑁 − 1) − (-𝑁 · 2)) = (𝑁 − 1))
116	115	oveq2d 7403	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑥↑((-𝑁 − 1) − (-𝑁 · 2))) = (𝑥↑(𝑁 − 1)))
117	91, 96, 97	divrec2d 11962	. . . . . . . . 9 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((𝑥↑(-𝑁 − 1)) / (𝑥↑(-𝑁 · 2))) = ((1 / (𝑥↑(-𝑁 · 2))) · (𝑥↑(-𝑁 − 1))))
118	102, 116, 117	3eqtr3rd 2773	. . . . . . . 8 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((1 / (𝑥↑(-𝑁 · 2))) · (𝑥↑(-𝑁 − 1))) = (𝑥↑(𝑁 − 1)))
119	118	oveq2d 7403	. . . . . . 7 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (𝑁 · ((1 / (𝑥↑(-𝑁 · 2))) · (𝑥↑(-𝑁 − 1)))) = (𝑁 · (𝑥↑(𝑁 − 1))))
120	101, 119	eqtrd 2764	. . . . . 6 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → ((1 / (𝑥↑(-𝑁 · 2))) · (𝑁 · (𝑥↑(-𝑁 − 1)))) = (𝑁 · (𝑥↑(𝑁 − 1))))
121	93, 100, 120	3eqtrd 2768	. . . . 5 ⊢ (((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) ∧ 𝑥 ∈ (ℂ ∖ {0})) → (-(1 / ((𝑥↑-𝑁)↑2)) · (-𝑁 · (𝑥↑(-𝑁 − 1)))) = (𝑁 · (𝑥↑(𝑁 − 1))))
122	121	mpteq2dva 5200	. . . 4 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (𝑥 ∈ (ℂ ∖ {0}) ↦ (-(1 / ((𝑥↑-𝑁)↑2)) · (-𝑁 · (𝑥↑(-𝑁 − 1))))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
123	46, 81, 122	3eqtrd 2768	. . 3 ⊢ ((𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ) → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
124	36, 123	jaoi 857	. 2 ⊢ ((𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))
125	1, 124	sylbi 217	1 ⊢ (𝑁 ∈ ℤ → (ℂ D (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑥↑𝑁))) = (𝑥 ∈ (ℂ ∖ {0}) ↦ (𝑁 · (𝑥↑(𝑁 − 1)))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∨ wo 847 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 Vcvv 3447 ∖ cdif 3911 ifcif 4488 {csn 4589 {cpr 4591 ↦ cmpt 5188 ‘cfv 6511 (class class class)co 7387 ℂcc 11066 ℝcr 11067 0cc0 11068 1c1 11069 + caddc 11071 · cmul 11073 − cmin 11405 -cneg 11406 / cdiv 11835 ℕcn 12186 2c2 12241 ℕ₀cn0 12442 ℤcz 12529 ↑cexp 14026 TopOpenctopn 17384 ℂ_fldccnfld 21264 D cdv 25764

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 ax-pre-sup 11146 ax-addf 11147

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-iin 4958 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-se 5592 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-isom 6520 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-of 7653 df-om 7843 df-1st 7968 df-2nd 7969 df-supp 8140 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-2o 8435 df-er 8671 df-map 8801 df-pm 8802 df-ixp 8871 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-fsupp 9313 df-fi 9362 df-sup 9393 df-inf 9394 df-oi 9463 df-card 9892 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-div 11836 df-nn 12187 df-2 12249 df-3 12250 df-4 12251 df-5 12252 df-6 12253 df-7 12254 df-8 12255 df-9 12256 df-n0 12443 df-z 12530 df-dec 12650 df-uz 12794 df-q 12908 df-rp 12952 df-xneg 13072 df-xadd 13073 df-xmul 13074 df-icc 13313 df-fz 13469 df-fzo 13616 df-seq 13967 df-exp 14027 df-hash 14296 df-cj 15065 df-re 15066 df-im 15067 df-sqrt 15201 df-abs 15202 df-struct 17117 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-ress 17201 df-plusg 17233 df-mulr 17234 df-starv 17235 df-sca 17236 df-vsca 17237 df-ip 17238 df-tset 17239 df-ple 17240 df-ds 17242 df-unif 17243 df-hom 17244 df-cco 17245 df-rest 17385 df-topn 17386 df-0g 17404 df-gsum 17405 df-topgen 17406 df-pt 17407 df-prds 17410 df-xrs 17465 df-qtop 17470 df-imas 17471 df-xps 17473 df-mre 17547 df-mrc 17548 df-acs 17550 df-mgm 18567 df-sgrp 18646 df-mnd 18662 df-submnd 18711 df-mulg 19000 df-cntz 19249 df-cmn 19712 df-psmet 21256 df-xmet 21257 df-met 21258 df-bl 21259 df-mopn 21260 df-fbas 21261 df-fg 21262 df-cnfld 21265 df-top 22781 df-topon 22798 df-topsp 22820 df-bases 22833 df-cld 22906 df-ntr 22907 df-cls 22908 df-nei 22985 df-lp 23023 df-perf 23024 df-cn 23114 df-cnp 23115 df-t1 23201 df-haus 23202 df-tx 23449 df-hmeo 23642 df-fil 23733 df-fm 23825 df-flim 23826 df-flf 23827 df-xms 24208 df-ms 24209 df-tms 24210 df-cncf 24771 df-limc 25767 df-dv 25768

This theorem is referenced by: (None)

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