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Theorem itgpowd 25558

Description: The integral of a monomial on a closed bounded interval of the real line. Co-authors TA and MC. (Contributed by Jon Pennant, 31-May-2019.) (Revised by Thierry Arnoux, 14-Jun-2019.)

**Hypotheses**
Ref	Expression
itgpowd.1	⊢ (𝜑 → 𝐴 ∈ ℝ)
itgpowd.2	⊢ (𝜑 → 𝐵 ∈ ℝ)
itgpowd.3	⊢ (𝜑 → 𝐴 ≤ 𝐵)
itgpowd.4	⊢ (𝜑 → 𝑁 ∈ ℕ₀)

**Assertion**
Ref	Expression
itgpowd	⊢ (𝜑 → ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥 = (((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))) / (𝑁 + 1)))

Distinct variable groups: 𝑥,𝐴 𝑥,𝐵 𝑥,𝑁 𝜑,𝑥

Proof of Theorem itgpowd Dummy variable 𝑡 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		itgpowd.4	. . . 4 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
2		nn0p1nn 12507	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℕ)
3	1, 2	syl 17	. . 3 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ)
4	3	nncnd 12224	. 2 ⊢ (𝜑 → (𝑁 + 1) ∈ ℂ)
5		itgpowd.1	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℝ)
6		itgpowd.2	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ)
7		iccssre 13402	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
8	5, 6, 7	syl2anc 584	. . . . . 6 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
9		ax-resscn 11163	. . . . . 6 ⊢ ℝ ⊆ ℂ
10	8, 9	sstrdi 3993	. . . . 5 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℂ)
11	10	sselda 3981	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → 𝑥 ∈ ℂ)
12	1	adantr 481	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℕ₀)
13	11, 12	expcld 14107	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝑥↑𝑁) ∈ ℂ)
14	10	resmptd 6038	. . . . 5 ⊢ (𝜑 → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ↾ (𝐴[,]𝐵)) = (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)))
15		expcncf 24433	. . . . . . 7 ⊢ (𝑁 ∈ ℕ₀ → (𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ∈ (ℂ–cn→ℂ))
16	1, 15	syl 17	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ∈ (ℂ–cn→ℂ))
17		rescncf 24404	. . . . . 6 ⊢ ((𝐴[,]𝐵) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ)))
18	10, 16, 17	sylc 65	. . . . 5 ⊢ (𝜑 → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
19	14, 18	eqeltrrd 2834	. . . 4 ⊢ (𝜑 → (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
20		cnicciblnc 25351	. . . 4 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ ((𝐴[,]𝐵)–cn→ℂ)) → (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ 𝐿¹)
21	5, 6, 19, 20	syl3anc 1371	. . 3 ⊢ (𝜑 → (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ 𝐿¹)
22	13, 21	itgcl 25292	. 2 ⊢ (𝜑 → ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥 ∈ ℂ)
23	3	nnne0d 12258	. 2 ⊢ (𝜑 → (𝑁 + 1) ≠ 0)
24	4, 13, 21	itgmulc2 25342	. . 3 ⊢ (𝜑 → ((𝑁 + 1) · ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥) = ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥)
25		eqidd 2733	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) = (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
26		oveq1 7412	. . . . . . . 8 ⊢ (𝑡 = 𝑥 → (𝑡↑𝑁) = (𝑥↑𝑁))
27	26	oveq2d 7421	. . . . . . 7 ⊢ (𝑡 = 𝑥 → ((𝑁 + 1) · (𝑡↑𝑁)) = ((𝑁 + 1) · (𝑥↑𝑁)))
28	27	adantl 482	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) ∧ 𝑡 = 𝑥) → ((𝑁 + 1) · (𝑡↑𝑁)) = ((𝑁 + 1) · (𝑥↑𝑁)))
29		simpr 485	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ (𝐴(,)𝐵))
30	4	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑁 + 1) ∈ ℂ)
31		ioossicc 13406	. . . . . . . . . 10 ⊢ (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵)
32	31	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵))
33	32	sselda 3981	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ (𝐴[,]𝐵))
34	33, 13	syldan 591	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑥↑𝑁) ∈ ℂ)
35	30, 34	mulcld 11230	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((𝑁 + 1) · (𝑥↑𝑁)) ∈ ℂ)
36	25, 28, 29, 35	fvmptd 7002	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) = ((𝑁 + 1) · (𝑥↑𝑁)))
37	36	itgeq2dv 25290	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) d𝑥 = ∫(𝐴(,)𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥)
38		itgpowd.3	. . . . . 6 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
39		reelprrecn 11198	. . . . . . . . 9 ⊢ ℝ ∈ {ℝ, ℂ}
40	39	a1i 11	. . . . . . . 8 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
41	9	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℝ ⊆ ℂ)
42	41	sselda 3981	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑡 ∈ ℂ)
43		1nn0 12484	. . . . . . . . . . . 12 ⊢ 1 ∈ ℕ₀
44	43	a1i 11	. . . . . . . . . . 11 ⊢ (𝜑 → 1 ∈ ℕ₀)
45	1, 44	nn0addcld 12532	. . . . . . . . . 10 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ₀)
46	45	adantr 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑁 + 1) ∈ ℕ₀)
47	42, 46	expcld 14107	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑡↑(𝑁 + 1)) ∈ ℂ)
48	1	nn0cnd 12530	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℂ)
49	48	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑁 ∈ ℂ)
50		1cnd 11205	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 1 ∈ ℂ)
51	49, 50	addcld 11229	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑁 + 1) ∈ ℂ)
52	1	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑁 ∈ ℕ₀)
53	42, 52	expcld 14107	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑡↑𝑁) ∈ ℂ)
54	51, 53	mulcld 11230	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
55		simpr 485	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → 𝑡 ∈ ℂ)
56	45	adantr 481	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑁 + 1) ∈ ℕ₀)
57	55, 56	expcld 14107	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑡↑(𝑁 + 1)) ∈ ℂ)
58	57	fmpttd 7111	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))):ℂ⟶ℂ)
59		ssidd 4004	. . . . . . . . . . 11 ⊢ (𝜑 → ℂ ⊆ ℂ)
60	4	adantr 481	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑁 + 1) ∈ ℂ)
61	1	adantr 481	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → 𝑁 ∈ ℕ₀)
62	55, 61	expcld 14107	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑡↑𝑁) ∈ ℂ)
63	60, 62	mulcld 11230	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
64	63	fmpttd 7111	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))):ℂ⟶ℂ)
65		dvexp 25461	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑁 + 1) ∈ ℕ → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1)))))
66	3, 65	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1)))))
67		1cnd 11205	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 1 ∈ ℂ)
68	48, 67	pncand 11568	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → ((𝑁 + 1) − 1) = 𝑁)
69	68	oveq2d 7421	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝑡↑((𝑁 + 1) − 1)) = (𝑡↑𝑁))
70	69	oveq2d 7421	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1))) = ((𝑁 + 1) · (𝑡↑𝑁)))
71	70	mpteq2dv 5249	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
72	66, 71	eqtrd 2772	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
73	72	feq1d 6699	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))):ℂ⟶ℂ ↔ (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))):ℂ⟶ℂ))
74	64, 73	mpbird 256	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))):ℂ⟶ℂ)
75	74	fdmd 6725	. . . . . . . . . . . 12 ⊢ (𝜑 → dom (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = ℂ)
76	9, 75	sseqtrrid 4034	. . . . . . . . . . 11 ⊢ (𝜑 → ℝ ⊆ dom (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))))
77		dvres3 25421	. . . . . . . . . . 11 ⊢ (((ℝ ∈ {ℝ, ℂ} ∧ (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))):ℂ⟶ℂ) ∧ (ℂ ⊆ ℂ ∧ ℝ ⊆ dom (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))))) → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) ↾ ℝ))
78	40, 58, 59, 76, 77	syl22anc 837	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) ↾ ℝ))
79	72	reseq1d 5978	. . . . . . . . . 10 ⊢ (𝜑 → ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) ↾ ℝ) = ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ))
80	78, 79	eqtrd 2772	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ))
81		resmpt 6035	. . . . . . . . . . 11 ⊢ (ℝ ⊆ ℂ → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ) = (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1))))
82	9, 81	mp1i 13	. . . . . . . . . 10 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ) = (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1))))
83	82	oveq2d 7421	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = (ℝ D (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1)))))
84		resmpt 6035	. . . . . . . . . 10 ⊢ (ℝ ⊆ ℂ → ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ) = (𝑡 ∈ ℝ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
85	9, 84	mp1i 13	. . . . . . . . 9 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ) = (𝑡 ∈ ℝ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
86	80, 83, 85	3eqtr3d 2780	. . . . . . . 8 ⊢ (𝜑 → (ℝ D (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℝ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
87		eqid 2732	. . . . . . . . 9 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
88	87	tgioo2 24310	. . . . . . . 8 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
89		iccntr 24328	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
90	5, 6, 89	syl2anc 584	. . . . . . . 8 ⊢ (𝜑 → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
91	40, 47, 54, 86, 8, 88, 87, 90	dvmptres2 25470	. . . . . . 7 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
92		ioossre 13381	. . . . . . . . . . 11 ⊢ (𝐴(,)𝐵) ⊆ ℝ
93	92, 9	sstri 3990	. . . . . . . . . 10 ⊢ (𝐴(,)𝐵) ⊆ ℂ
94	93	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ ℂ)
95		cncfmptc 24419	. . . . . . . . 9 ⊢ (((𝑁 + 1) ∈ ℂ ∧ (𝐴(,)𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
96	4, 94, 59, 95	syl3anc 1371	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
97		resmpt 6035	. . . . . . . . . 10 ⊢ ((𝐴(,)𝐵) ⊆ ℂ → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴(,)𝐵)) = (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑡↑𝑁)))
98	93, 97	mp1i 13	. . . . . . . . 9 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴(,)𝐵)) = (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑡↑𝑁)))
99		expcncf 24433	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ℕ₀ → (𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ∈ (ℂ–cn→ℂ))
100	1, 99	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ∈ (ℂ–cn→ℂ))
101		rescncf 24404	. . . . . . . . . 10 ⊢ ((𝐴(,)𝐵) ⊆ ℂ → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ∈ (ℂ–cn→ℂ) → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴(,)𝐵)) ∈ ((𝐴(,)𝐵)–cn→ℂ)))
102	94, 100, 101	sylc 65	. . . . . . . . 9 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴(,)𝐵)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
103	98, 102	eqeltrrd 2834	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑡↑𝑁)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
104	96, 103	mulcncf 24954	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ ((𝐴(,)𝐵)–cn→ℂ))
105	91, 104	eqeltrd 2833	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) ∈ ((𝐴(,)𝐵)–cn→ℂ))
106		ioombl 25073	. . . . . . . . 9 ⊢ (𝐴(,)𝐵) ∈ dom vol
107	106	a1i 11	. . . . . . . 8 ⊢ (𝜑 → (𝐴(,)𝐵) ∈ dom vol)
108	48	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℂ)
109		1cnd 11205	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 1 ∈ ℂ)
110	108, 109	addcld 11229	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (𝑁 + 1) ∈ ℂ)
111	10	sselda 3981	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑡 ∈ ℂ)
112	1	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℕ₀)
113	111, 112	expcld 14107	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (𝑡↑𝑁) ∈ ℂ)
114	110, 113	mulcld 11230	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
115		cncfmptc 24419	. . . . . . . . . . 11 ⊢ (((𝑁 + 1) ∈ ℂ ∧ (𝐴[,]𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
116	4, 10, 59, 115	syl3anc 1371	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
117	10	resmptd 6038	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴[,]𝐵)) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑𝑁)))
118		rescncf 24404	. . . . . . . . . . . 12 ⊢ ((𝐴[,]𝐵) ⊆ ℂ → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ∈ (ℂ–cn→ℂ) → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ)))
119	10, 100, 118	sylc 65	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
120	117, 119	eqeltrrd 2834	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑𝑁)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
121	116, 120	mulcncf 24954	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
122		cnicciblnc 25351	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ ((𝐴[,]𝐵)–cn→ℂ)) → (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ 𝐿¹)
123	5, 6, 121, 122	syl3anc 1371	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ 𝐿¹)
124	32, 107, 114, 123	iblss 25313	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ 𝐿¹)
125	91, 124	eqeltrd 2833	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) ∈ 𝐿¹)
126	10	resmptd 6038	. . . . . . 7 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ (𝐴[,]𝐵)) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))
127		expcncf 24433	. . . . . . . . 9 ⊢ ((𝑁 + 1) ∈ ℕ₀ → (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ∈ (ℂ–cn→ℂ))
128	45, 127	syl 17	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ∈ (ℂ–cn→ℂ))
129		rescncf 24404	. . . . . . . 8 ⊢ ((𝐴[,]𝐵) ⊆ ℂ → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ∈ (ℂ–cn→ℂ) → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ)))
130	10, 128, 129	sylc 65	. . . . . . 7 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ (𝐴[,]𝐵)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
131	126, 130	eqeltrrd 2834	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
132	5, 6, 38, 105, 125, 131	ftc2 25552	. . . . 5 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) d𝑥 = (((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐵) − ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐴)))
133	91	fveq1d 6890	. . . . . . 7 ⊢ (𝜑 → ((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) = ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥))
134	133	ralrimivw 3150	. . . . . 6 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) = ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥))
135		itgeq2 25286	. . . . . 6 ⊢ (∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) = ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) → ∫(𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) d𝑥 = ∫(𝐴(,)𝐵)((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) d𝑥)
136	134, 135	syl 17	. . . . 5 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) d𝑥 = ∫(𝐴(,)𝐵)((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) d𝑥)
137		eqidd 2733	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))
138		simpr 485	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 = 𝐵) → 𝑡 = 𝐵)
139	138	oveq1d 7420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 = 𝐵) → (𝑡↑(𝑁 + 1)) = (𝐵↑(𝑁 + 1)))
140	5	rexrd 11260	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
141	6	rexrd 11260	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
142		ubicc2 13438	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐵 ∈ (𝐴[,]𝐵))
143	140, 141, 38, 142	syl3anc 1371	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ (𝐴[,]𝐵))
144	6	recnd 11238	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℂ)
145	144, 45	expcld 14107	. . . . . . 7 ⊢ (𝜑 → (𝐵↑(𝑁 + 1)) ∈ ℂ)
146	137, 139, 143, 145	fvmptd 7002	. . . . . 6 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐵) = (𝐵↑(𝑁 + 1)))
147		simpr 485	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 = 𝐴) → 𝑡 = 𝐴)
148	147	oveq1d 7420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 = 𝐴) → (𝑡↑(𝑁 + 1)) = (𝐴↑(𝑁 + 1)))
149		lbicc2 13437	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵))
150	140, 141, 38, 149	syl3anc 1371	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵))
151	5	recnd 11238	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℂ)
152	151, 45	expcld 14107	. . . . . . 7 ⊢ (𝜑 → (𝐴↑(𝑁 + 1)) ∈ ℂ)
153	137, 148, 150, 152	fvmptd 7002	. . . . . 6 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐴) = (𝐴↑(𝑁 + 1)))
154	146, 153	oveq12d 7423	. . . . 5 ⊢ (𝜑 → (((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐵) − ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐴)) = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
155	132, 136, 154	3eqtr3d 2780	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) d𝑥 = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
156	4	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝑁 + 1) ∈ ℂ)
157	156, 13	mulcld 11230	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → ((𝑁 + 1) · (𝑥↑𝑁)) ∈ ℂ)
158	5, 6, 157	itgioo 25324	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥 = ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥)
159	37, 155, 158	3eqtr3rd 2781	. . 3 ⊢ (𝜑 → ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥 = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
160	24, 159	eqtrd 2772	. 2 ⊢ (𝜑 → ((𝑁 + 1) · ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥) = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
161	4, 22, 23, 160	mvllmuld 12042	1 ⊢ (𝜑 → ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥 = (((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))) / (𝑁 + 1)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∀wral 3061 ⊆ wss 3947 {cpr 4629 class class class wbr 5147 ↦ cmpt 5230 dom cdm 5675 ran crn 5676 ↾ cres 5677 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 ℂcc 11104 ℝcr 11105 1c1 11107 + caddc 11109 · cmul 11111 ℝ^*cxr 11243 ≤ cle 11245 − cmin 11440 / cdiv 11867 ℕcn 12208 ℕ₀cn0 12468 (,)cioo 13320 [,]cicc 13323 ↑cexp 14023 TopOpenctopn 17363 topGenctg 17379 ℂ_fldccnfld 20936 intcnt 22512 –cn→ccncf 24383 volcvol 24971 𝐿¹cibl 25125 ∫citg 25126 D cdv 25371

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-inf2 9632 ax-cc 10426 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 ax-addf 11185 ax-mulf 11186

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-symdif 4241 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-disj 5113 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-ofr 7667 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-2o 8463 df-oadd 8466 df-omul 8467 df-er 8699 df-map 8818 df-pm 8819 df-ixp 8888 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-fi 9402 df-sup 9433 df-inf 9434 df-oi 9501 df-dju 9892 df-card 9930 df-acn 9933 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-div 11868 df-nn 12209 df-2 12271 df-3 12272 df-4 12273 df-5 12274 df-6 12275 df-7 12276 df-8 12277 df-9 12278 df-n0 12469 df-z 12555 df-dec 12674 df-uz 12819 df-q 12929 df-rp 12971 df-xneg 13088 df-xadd 13089 df-xmul 13090 df-ioo 13324 df-ioc 13325 df-ico 13326 df-icc 13327 df-fz 13481 df-fzo 13624 df-fl 13753 df-mod 13831 df-seq 13963 df-exp 14024 df-hash 14287 df-cj 15042 df-re 15043 df-im 15044 df-sqrt 15178 df-abs 15179 df-clim 15428 df-rlim 15429 df-sum 15629 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-ress 17170 df-plusg 17206 df-mulr 17207 df-starv 17208 df-sca 17209 df-vsca 17210 df-ip 17211 df-tset 17212 df-ple 17213 df-ds 17215 df-unif 17216 df-hom 17217 df-cco 17218 df-rest 17364 df-topn 17365 df-0g 17383 df-gsum 17384 df-topgen 17385 df-pt 17386 df-prds 17389 df-xrs 17444 df-qtop 17449 df-imas 17450 df-xps 17452 df-mre 17526 df-mrc 17527 df-acs 17529 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-submnd 18668 df-mulg 18945 df-cntz 19175 df-cmn 19644 df-psmet 20928 df-xmet 20929 df-met 20930 df-bl 20931 df-mopn 20932 df-fbas 20933 df-fg 20934 df-cnfld 20937 df-top 22387 df-topon 22404 df-topsp 22426 df-bases 22440 df-cld 22514 df-ntr 22515 df-cls 22516 df-nei 22593 df-lp 22631 df-perf 22632 df-cn 22722 df-cnp 22723 df-haus 22810 df-cmp 22882 df-tx 23057 df-hmeo 23250 df-fil 23341 df-fm 23433 df-flim 23434 df-flf 23435 df-xms 23817 df-ms 23818 df-tms 23819 df-cncf 24385 df-ovol 24972 df-vol 24973 df-mbf 25127 df-itg1 25128 df-itg2 25129 df-ibl 25130 df-itg 25131 df-0p 25178 df-limc 25374 df-dv 25375

This theorem is referenced by: lcmineqlem3 40884 areaquad 41950

W3C validator