itgpowd - Metamath Proof Explorer

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Theorem itgpowd 25905

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 12518	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → (𝑁 + 1) ∈ ℕ)
3	1, 2	syl 17	. . 3 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ)
4	3	nncnd 12235	. 2 ⊢ (𝜑 → (𝑁 + 1) ∈ ℂ)
5		itgpowd.1	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ ℝ)
6		itgpowd.2	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ ℝ)
7		iccssre 13413	. . . . . . 7 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
8	5, 6, 7	syl2anc 583	. . . . . 6 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
9		ax-resscn 11173	. . . . . 6 ⊢ ℝ ⊆ ℂ
10	8, 9	sstrdi 3994	. . . . 5 ⊢ (𝜑 → (𝐴[,]𝐵) ⊆ ℂ)
11	10	sselda 3982	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → 𝑥 ∈ ℂ)
12	1	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℕ₀)
13	11, 12	expcld 14118	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝑥↑𝑁) ∈ ℂ)
14	10	resmptd 6040	. . . . 5 ⊢ (𝜑 → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑁)) ↾ (𝐴[,]𝐵)) = (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)))
15		expcncf 24767	. . . . . . 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 24737	. . . . . 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 2833	. . . 4 ⊢ (𝜑 → (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
20		cnicciblnc 25692	. . . 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 1370	. . 3 ⊢ (𝜑 → (𝑥 ∈ (𝐴[,]𝐵) ↦ (𝑥↑𝑁)) ∈ 𝐿¹)
22	13, 21	itgcl 25633	. 2 ⊢ (𝜑 → ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥 ∈ ℂ)
23	3	nnne0d 12269	. 2 ⊢ (𝜑 → (𝑁 + 1) ≠ 0)
24	4, 13, 21	itgmulc2 25683	. . 3 ⊢ (𝜑 → ((𝑁 + 1) · ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥) = ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥)
25		eqidd 2732	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) = (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
26		oveq1 7419	. . . . . . . 8 ⊢ (𝑡 = 𝑥 → (𝑡↑𝑁) = (𝑥↑𝑁))
27	26	oveq2d 7428	. . . . . . 7 ⊢ (𝑡 = 𝑥 → ((𝑁 + 1) · (𝑡↑𝑁)) = ((𝑁 + 1) · (𝑥↑𝑁)))
28	27	adantl 481	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) ∧ 𝑡 = 𝑥) → ((𝑁 + 1) · (𝑡↑𝑁)) = ((𝑁 + 1) · (𝑥↑𝑁)))
29		simpr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ (𝐴(,)𝐵))
30	4	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑁 + 1) ∈ ℂ)
31		ioossicc 13417	. . . . . . . . . 10 ⊢ (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵)
32	31	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ (𝐴[,]𝐵))
33	32	sselda 3982	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → 𝑥 ∈ (𝐴[,]𝐵))
34	33, 13	syldan 590	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → (𝑥↑𝑁) ∈ ℂ)
35	30, 34	mulcld 11241	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((𝑁 + 1) · (𝑥↑𝑁)) ∈ ℂ)
36	25, 28, 29, 35	fvmptd 7005	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) = ((𝑁 + 1) · (𝑥↑𝑁)))
37	36	itgeq2dv 25631	. . . 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 11208	. . . . . . . . 9 ⊢ ℝ ∈ {ℝ, ℂ}
40	39	a1i 11	. . . . . . . 8 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
41	9	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ℝ ⊆ ℂ)
42	41	sselda 3982	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑡 ∈ ℂ)
43		1nn0 12495	. . . . . . . . . . . 12 ⊢ 1 ∈ ℕ₀
44	43	a1i 11	. . . . . . . . . . 11 ⊢ (𝜑 → 1 ∈ ℕ₀)
45	1, 44	nn0addcld 12543	. . . . . . . . . 10 ⊢ (𝜑 → (𝑁 + 1) ∈ ℕ₀)
46	45	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑁 + 1) ∈ ℕ₀)
47	42, 46	expcld 14118	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑡↑(𝑁 + 1)) ∈ ℂ)
48	1	nn0cnd 12541	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℂ)
49	48	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑁 ∈ ℂ)
50		1cnd 11216	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 1 ∈ ℂ)
51	49, 50	addcld 11240	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑁 + 1) ∈ ℂ)
52	1	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → 𝑁 ∈ ℕ₀)
53	42, 52	expcld 14118	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (𝑡↑𝑁) ∈ ℂ)
54	51, 53	mulcld 11241	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
55		simpr 484	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → 𝑡 ∈ ℂ)
56	45	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑁 + 1) ∈ ℕ₀)
57	55, 56	expcld 14118	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑡↑(𝑁 + 1)) ∈ ℂ)
58	57	fmpttd 7116	. . . . . . . . . . 11 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))):ℂ⟶ℂ)
59		ssidd 4005	. . . . . . . . . . 11 ⊢ (𝜑 → ℂ ⊆ ℂ)
60	4	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑁 + 1) ∈ ℂ)
61	1	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → 𝑁 ∈ ℕ₀)
62	55, 61	expcld 14118	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → (𝑡↑𝑁) ∈ ℂ)
63	60, 62	mulcld 11241	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑡 ∈ ℂ) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
64	63	fmpttd 7116	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))):ℂ⟶ℂ)
65		dvexp 25805	. . . . . . . . . . . . . . . . 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 11216	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 1 ∈ ℂ)
68	48, 67	pncand 11579	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → ((𝑁 + 1) − 1) = 𝑁)
69	68	oveq2d 7428	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝑡↑((𝑁 + 1) − 1)) = (𝑡↑𝑁))
70	69	oveq2d 7428	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1))) = ((𝑁 + 1) · (𝑡↑𝑁)))
71	70	mpteq2dv 5250	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑((𝑁 + 1) − 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
72	66, 71	eqtrd 2771	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
73	72	feq1d 6702	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))):ℂ⟶ℂ ↔ (𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))):ℂ⟶ℂ))
74	64, 73	mpbird 257	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))):ℂ⟶ℂ)
75	74	fdmd 6728	. . . . . . . . . . . 12 ⊢ (𝜑 → dom (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) = ℂ)
76	9, 75	sseqtrrid 4035	. . . . . . . . . . 11 ⊢ (𝜑 → ℝ ⊆ dom (ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))))
77		dvres3 25762	. . . . . . . . . . 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 836	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) ↾ ℝ))
79	72	reseq1d 5980	. . . . . . . . . 10 ⊢ (𝜑 → ((ℂ D (𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1)))) ↾ ℝ) = ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ))
80	78, 79	eqtrd 2771	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = ((𝑡 ∈ ℂ ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ↾ ℝ))
81		resmpt 6037	. . . . . . . . . . 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 7428	. . . . . . . . 9 ⊢ (𝜑 → (ℝ D ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ ℝ)) = (ℝ D (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1)))))
84		resmpt 6037	. . . . . . . . . 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 2779	. . . . . . . 8 ⊢ (𝜑 → (ℝ D (𝑡 ∈ ℝ ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ ℝ ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
87		eqid 2731	. . . . . . . . 9 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
88	87	tgioo2 24639	. . . . . . . 8 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
89		iccntr 24657	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
90	5, 6, 89	syl2anc 583	. . . . . . . 8 ⊢ (𝜑 → ((int‘(topGen‘ran (,)))‘(𝐴[,]𝐵)) = (𝐴(,)𝐵))
91	40, 47, 54, 86, 8, 88, 87, 90	dvmptres2 25814	. . . . . . 7 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) = (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))))
92		ioossre 13392	. . . . . . . . . . 11 ⊢ (𝐴(,)𝐵) ⊆ ℝ
93	92, 9	sstri 3991	. . . . . . . . . 10 ⊢ (𝐴(,)𝐵) ⊆ ℂ
94	93	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ ℂ)
95		cncfmptc 24752	. . . . . . . . 9 ⊢ (((𝑁 + 1) ∈ ℂ ∧ (𝐴(,)𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
96	4, 94, 59, 95	syl3anc 1370	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
97		resmpt 6037	. . . . . . . . . 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 24767	. . . . . . . . . . 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 24737	. . . . . . . . . 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 2833	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ (𝑡↑𝑁)) ∈ ((𝐴(,)𝐵)–cn→ℂ))
104	96, 103	mulcncf 25294	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ ((𝐴(,)𝐵)–cn→ℂ))
105	91, 104	eqeltrd 2832	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) ∈ ((𝐴(,)𝐵)–cn→ℂ))
106		ioombl 25414	. . . . . . . . 9 ⊢ (𝐴(,)𝐵) ∈ dom vol
107	106	a1i 11	. . . . . . . 8 ⊢ (𝜑 → (𝐴(,)𝐵) ∈ dom vol)
108	48	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℂ)
109		1cnd 11216	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 1 ∈ ℂ)
110	108, 109	addcld 11240	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (𝑁 + 1) ∈ ℂ)
111	10	sselda 3982	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑡 ∈ ℂ)
112	1	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → 𝑁 ∈ ℕ₀)
113	111, 112	expcld 14118	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → (𝑡↑𝑁) ∈ ℂ)
114	110, 113	mulcld 11241	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 ∈ (𝐴[,]𝐵)) → ((𝑁 + 1) · (𝑡↑𝑁)) ∈ ℂ)
115		cncfmptc 24752	. . . . . . . . . . 11 ⊢ (((𝑁 + 1) ∈ ℂ ∧ (𝐴[,]𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
116	4, 10, 59, 115	syl3anc 1370	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑁 + 1)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
117	10	resmptd 6040	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑𝑁)) ↾ (𝐴[,]𝐵)) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑𝑁)))
118		rescncf 24737	. . . . . . . . . . . 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 2833	. . . . . . . . . 10 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑𝑁)) ∈ ((𝐴[,]𝐵)–cn→ℂ))
121	116, 120	mulcncf 25294	. . . . . . . . 9 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
122		cnicciblnc 25692	. . . . . . . . 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 1370	. . . . . . . 8 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ 𝐿¹)
124	32, 107, 114, 123	iblss 25654	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁))) ∈ 𝐿¹)
125	91, 124	eqeltrd 2832	. . . . . 6 ⊢ (𝜑 → (ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))) ∈ 𝐿¹)
126	10	resmptd 6040	. . . . . . 7 ⊢ (𝜑 → ((𝑡 ∈ ℂ ↦ (𝑡↑(𝑁 + 1))) ↾ (𝐴[,]𝐵)) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))
127		expcncf 24767	. . . . . . . . 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 24737	. . . . . . . 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 2833	. . . . . 6 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))) ∈ ((𝐴[,]𝐵)–cn→ℂ))
132	5, 6, 38, 105, 125, 131	ftc2 25899	. . . . 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 6893	. . . . . . 7 ⊢ (𝜑 → ((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) = ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥))
134	133	ralrimivw 3149	. . . . . 6 ⊢ (𝜑 → ∀𝑥 ∈ (𝐴(,)𝐵)((ℝ D (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))‘𝑥) = ((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥))
135		itgeq2 25627	. . . . . 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 2732	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))) = (𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1))))
138		simpr 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 = 𝐵) → 𝑡 = 𝐵)
139	138	oveq1d 7427	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 = 𝐵) → (𝑡↑(𝑁 + 1)) = (𝐵↑(𝑁 + 1)))
140	5	rexrd 11271	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
141	6	rexrd 11271	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
142		ubicc2 13449	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐵 ∈ (𝐴[,]𝐵))
143	140, 141, 38, 142	syl3anc 1370	. . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ (𝐴[,]𝐵))
144	6	recnd 11249	. . . . . . . 8 ⊢ (𝜑 → 𝐵 ∈ ℂ)
145	144, 45	expcld 14118	. . . . . . 7 ⊢ (𝜑 → (𝐵↑(𝑁 + 1)) ∈ ℂ)
146	137, 139, 143, 145	fvmptd 7005	. . . . . 6 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐵) = (𝐵↑(𝑁 + 1)))
147		simpr 484	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑡 = 𝐴) → 𝑡 = 𝐴)
148	147	oveq1d 7427	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑡 = 𝐴) → (𝑡↑(𝑁 + 1)) = (𝐴↑(𝑁 + 1)))
149		lbicc2 13448	. . . . . . . 8 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^* ∧ 𝐴 ≤ 𝐵) → 𝐴 ∈ (𝐴[,]𝐵))
150	140, 141, 38, 149	syl3anc 1370	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ (𝐴[,]𝐵))
151	5	recnd 11249	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ ℂ)
152	151, 45	expcld 14118	. . . . . . 7 ⊢ (𝜑 → (𝐴↑(𝑁 + 1)) ∈ ℂ)
153	137, 148, 150, 152	fvmptd 7005	. . . . . 6 ⊢ (𝜑 → ((𝑡 ∈ (𝐴[,]𝐵) ↦ (𝑡↑(𝑁 + 1)))‘𝐴) = (𝐴↑(𝑁 + 1)))
154	146, 153	oveq12d 7430	. . . . 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 2779	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((𝑡 ∈ (𝐴(,)𝐵) ↦ ((𝑁 + 1) · (𝑡↑𝑁)))‘𝑥) d𝑥 = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
156	4	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → (𝑁 + 1) ∈ ℂ)
157	156, 13	mulcld 11241	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴[,]𝐵)) → ((𝑁 + 1) · (𝑥↑𝑁)) ∈ ℂ)
158	5, 6, 157	itgioo 25665	. . . 4 ⊢ (𝜑 → ∫(𝐴(,)𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥 = ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥)
159	37, 155, 158	3eqtr3rd 2780	. . 3 ⊢ (𝜑 → ∫(𝐴[,]𝐵)((𝑁 + 1) · (𝑥↑𝑁)) d𝑥 = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
160	24, 159	eqtrd 2771	. 2 ⊢ (𝜑 → ((𝑁 + 1) · ∫(𝐴[,]𝐵)(𝑥↑𝑁) d𝑥) = ((𝐵↑(𝑁 + 1)) − (𝐴↑(𝑁 + 1))))
161	4, 22, 23, 160	mvllmuld 12053	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 395 = wceq 1540 ∈ wcel 2105 ∀wral 3060 ⊆ wss 3948 {cpr 4630 class class class wbr 5148 ↦ cmpt 5231 dom cdm 5676 ran crn 5677 ↾ cres 5678 ⟶wf 6539 ‘cfv 6543 (class class class)co 7412 ℂcc 11114 ℝcr 11115 1c1 11117 + caddc 11119 · cmul 11121 ℝ^*cxr 11254 ≤ cle 11256 − cmin 11451 / cdiv 11878 ℕcn 12219 ℕ₀cn0 12479 (,)cioo 13331 [,]cicc 13334 ↑cexp 14034 TopOpenctopn 17374 topGenctg 17390 ℂ_fldccnfld 21233 intcnt 22841 –cn→ccncf 24716 volcvol 25312 𝐿¹cibl 25466 ∫citg 25467 D cdv 25712

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-inf2 9642 ax-cc 10436 ax-cnex 11172 ax-resscn 11173 ax-1cn 11174 ax-icn 11175 ax-addcl 11176 ax-addrcl 11177 ax-mulcl 11178 ax-mulrcl 11179 ax-mulcom 11180 ax-addass 11181 ax-mulass 11182 ax-distr 11183 ax-i2m1 11184 ax-1ne0 11185 ax-1rid 11186 ax-rnegex 11187 ax-rrecex 11188 ax-cnre 11189 ax-pre-lttri 11190 ax-pre-lttrn 11191 ax-pre-ltadd 11192 ax-pre-mulgt0 11193 ax-pre-sup 11194 ax-addf 11195

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-symdif 4242 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-disj 5114 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7674 df-ofr 7675 df-om 7860 df-1st 7979 df-2nd 7980 df-supp 8152 df-frecs 8272 df-wrecs 8303 df-recs 8377 df-rdg 8416 df-1o 8472 df-2o 8473 df-oadd 8476 df-omul 8477 df-er 8709 df-map 8828 df-pm 8829 df-ixp 8898 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9368 df-fi 9412 df-sup 9443 df-inf 9444 df-oi 9511 df-dju 9902 df-card 9940 df-acn 9943 df-pnf 11257 df-mnf 11258 df-xr 11259 df-ltxr 11260 df-le 11261 df-sub 11453 df-neg 11454 df-div 11879 df-nn 12220 df-2 12282 df-3 12283 df-4 12284 df-5 12285 df-6 12286 df-7 12287 df-8 12288 df-9 12289 df-n0 12480 df-z 12566 df-dec 12685 df-uz 12830 df-q 12940 df-rp 12982 df-xneg 13099 df-xadd 13100 df-xmul 13101 df-ioo 13335 df-ioc 13336 df-ico 13337 df-icc 13338 df-fz 13492 df-fzo 13635 df-fl 13764 df-mod 13842 df-seq 13974 df-exp 14035 df-hash 14298 df-cj 15053 df-re 15054 df-im 15055 df-sqrt 15189 df-abs 15190 df-clim 15439 df-rlim 15440 df-sum 15640 df-struct 17087 df-sets 17104 df-slot 17122 df-ndx 17134 df-base 17152 df-ress 17181 df-plusg 17217 df-mulr 17218 df-starv 17219 df-sca 17220 df-vsca 17221 df-ip 17222 df-tset 17223 df-ple 17224 df-ds 17226 df-unif 17227 df-hom 17228 df-cco 17229 df-rest 17375 df-topn 17376 df-0g 17394 df-gsum 17395 df-topgen 17396 df-pt 17397 df-prds 17400 df-xrs 17455 df-qtop 17460 df-imas 17461 df-xps 17463 df-mre 17537 df-mrc 17538 df-acs 17540 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-submnd 18712 df-mulg 18994 df-cntz 19229 df-cmn 19698 df-psmet 21225 df-xmet 21226 df-met 21227 df-bl 21228 df-mopn 21229 df-fbas 21230 df-fg 21231 df-cnfld 21234 df-top 22716 df-topon 22733 df-topsp 22755 df-bases 22769 df-cld 22843 df-ntr 22844 df-cls 22845 df-nei 22922 df-lp 22960 df-perf 22961 df-cn 23051 df-cnp 23052 df-haus 23139 df-cmp 23211 df-tx 23386 df-hmeo 23579 df-fil 23670 df-fm 23762 df-flim 23763 df-flf 23764 df-xms 24146 df-ms 24147 df-tms 24148 df-cncf 24718 df-ovol 25313 df-vol 25314 df-mbf 25468 df-itg1 25469 df-itg2 25470 df-ibl 25471 df-itg 25472 df-0p 25519 df-limc 25715 df-dv 25716

This theorem is referenced by: lcmineqlem3 41363 areaquad 42428

W3C validator