Theorem prodfdivap 12024

Description: The quotient of two products. (Contributed by Scott Fenton, 15-Jan-2018.) (Revised by Jim Kingdon, 24-Mar-2024.)

Hypotheses

Ref	Expression
prodfdiv.1	⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
prodfdivap.2	⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑘) ∈ ℂ)
prodfdivap.3	⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) ∈ ℂ)
prodfdivap.4	⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) # 0)
prodfdivap.5	⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐻‘𝑘) = ((𝐹‘𝑘) / (𝐺‘𝑘)))

Assertion

Ref	Expression
prodfdivap	⊢ (𝜑 → (seq𝑀( · , 𝐻)‘𝑁) = ((seq𝑀( · , 𝐹)‘𝑁) / (seq𝑀( · , 𝐺)‘𝑁)))

Distinct variable groups:   𝑘,𝐹   𝑘,𝐺   𝑘,𝐻   𝜑,𝑘   𝑘,𝑀   𝑘,𝑁

Proof of Theorem prodfdivap

Dummy variable 𝑛 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		prodfdiv.1	. . . 4 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
2		prodfdivap.3	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) ∈ ℂ)
3		elfzuz 10185	. . . . 5 ⊢ (𝑘 ∈ (𝑀...𝑁) → 𝑘 ∈ (ℤ≥‘𝑀))
4		prodfdivap.4	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) # 0)
5	3, 4	sylan2 286	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → (𝐺‘𝑘) # 0)
6		eqid 2209	. . . . . 6 ⊢ (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))) = (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))
7		fveq2 5603	. . . . . . 7 ⊢ (𝑛 = 𝑘 → (𝐺‘𝑛) = (𝐺‘𝑘))
8	7	oveq2d 5990	. . . . . 6 ⊢ (𝑛 = 𝑘 → (1 / (𝐺‘𝑛)) = (1 / (𝐺‘𝑘)))
9		simpr 110	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → 𝑘 ∈ (ℤ≥‘𝑀))
10	2, 4	recclapd 8896	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (1 / (𝐺‘𝑘)) ∈ ℂ)
11	6, 8, 9, 10	fvmptd3 5701	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) = (1 / (𝐺‘𝑘)))
12	3, 11	sylan2 286	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑁)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) = (1 / (𝐺‘𝑘)))
13	11, 10	eqeltrd 2286	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) ∈ ℂ)
14	1, 2, 5, 12, 13	prodfrecap 12023	. . 3 ⊢ (𝜑 → (seq𝑀( · , (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))))‘𝑁) = (1 / (seq𝑀( · , 𝐺)‘𝑁)))
15	14	oveq2d 5990	. 2 ⊢ (𝜑 → ((seq𝑀( · , 𝐹)‘𝑁) · (seq𝑀( · , (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))))‘𝑁)) = ((seq𝑀( · , 𝐹)‘𝑁) · (1 / (seq𝑀( · , 𝐺)‘𝑁))))
16		prodfdivap.2	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐹‘𝑘) ∈ ℂ)
17		eleq1w 2270	. . . . . . . . 9 ⊢ (𝑘 = 𝑛 → (𝑘 ∈ (ℤ≥‘𝑀) ↔ 𝑛 ∈ (ℤ≥‘𝑀)))
18	17	anbi2d 464	. . . . . . . 8 ⊢ (𝑘 = 𝑛 → ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) ↔ (𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀))))
19		fveq2 5603	. . . . . . . . 9 ⊢ (𝑘 = 𝑛 → (𝐺‘𝑘) = (𝐺‘𝑛))
20	19	eleq1d 2278	. . . . . . . 8 ⊢ (𝑘 = 𝑛 → ((𝐺‘𝑘) ∈ ℂ ↔ (𝐺‘𝑛) ∈ ℂ))
21	18, 20	imbi12d 234	. . . . . . 7 ⊢ (𝑘 = 𝑛 → (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) ∈ ℂ) ↔ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) ∈ ℂ)))
22	21, 2	chvarvv 1935	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) ∈ ℂ)
23	19	breq1d 4072	. . . . . . . 8 ⊢ (𝑘 = 𝑛 → ((𝐺‘𝑘) # 0 ↔ (𝐺‘𝑛) # 0))
24	18, 23	imbi12d 234	. . . . . . 7 ⊢ (𝑘 = 𝑛 → (((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑘) # 0) ↔ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) # 0)))
25	24, 4	chvarvv 1935	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) # 0)
26	22, 25	recclapd 8896	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (1 / (𝐺‘𝑛)) ∈ ℂ)
27	26	fmpttd 5763	. . . 4 ⊢ (𝜑 → (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))):(ℤ≥‘𝑀)⟶ℂ)
28	27	ffvelcdmda 5743	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) ∈ ℂ)
29	16, 2, 4	divrecapd 8908	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝐹‘𝑘) / (𝐺‘𝑘)) = ((𝐹‘𝑘) · (1 / (𝐺‘𝑘))))
30		prodfdivap.5	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐻‘𝑘) = ((𝐹‘𝑘) / (𝐺‘𝑘)))
31	11	oveq2d 5990	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝐹‘𝑘) · ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘)) = ((𝐹‘𝑘) · (1 / (𝐺‘𝑘))))
32	29, 30, 31	3eqtr4d 2252	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐻‘𝑘) = ((𝐹‘𝑘) · ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘)))
33	1, 16, 28, 32	prod3fmul 12018	. 2 ⊢ (𝜑 → (seq𝑀( · , 𝐻)‘𝑁) = ((seq𝑀( · , 𝐹)‘𝑁) · (seq𝑀( · , (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))))‘𝑁)))
34		eqid 2209	. . . . 5 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀)
35		eluzel2 9695	. . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ)
36	1, 35	syl 14	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℤ)
37	34, 36, 16	prodf 12015	. . . 4 ⊢ (𝜑 → seq𝑀( · , 𝐹):(ℤ≥‘𝑀)⟶ℂ)
38	37, 1	ffvelcdmd 5744	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐹)‘𝑁) ∈ ℂ)
39	34, 36, 2	prodf 12015	. . . 4 ⊢ (𝜑 → seq𝑀( · , 𝐺):(ℤ≥‘𝑀)⟶ℂ)
40	39, 1	ffvelcdmd 5744	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐺)‘𝑁) ∈ ℂ)
41	1, 2, 5	prodfap0 12022	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐺)‘𝑁) # 0)
42	38, 40, 41	divrecapd 8908	. 2 ⊢ (𝜑 → ((seq𝑀( · , 𝐹)‘𝑁) / (seq𝑀( · , 𝐺)‘𝑁)) = ((seq𝑀( · , 𝐹)‘𝑁) · (1 / (seq𝑀( · , 𝐺)‘𝑁))))
43	15, 33, 42	3eqtr4d 2252	1 ⊢ (𝜑 → (seq𝑀( · , 𝐻)‘𝑁) = ((seq𝑀( · , 𝐹)‘𝑁) / (seq𝑀( · , 𝐺)‘𝑁)))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1375   ∈ wcel 2180   class class class wbr 4062   ↦ cmpt 4124  ‘cfv 5294  (class class class)co 5974  ℂcc 7965  0cc0 7967  1c1 7968   · cmul 7972   # cap 8696   / cdiv 8787  ℤcz 9414  ℤ_≥cuz 9690  ...cfz 10172  seqcseq 10636

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 713  ax-5 1473  ax-7 1474  ax-gen 1475  ax-ie1 1519  ax-ie2 1520  ax-8 1530  ax-10 1531  ax-11 1532  ax-i12 1533  ax-bndl 1535  ax-4 1536  ax-17 1552  ax-i9 1556  ax-ial 1560  ax-i5r 1561  ax-13 2182  ax-14 2183  ax-ext 2191  ax-coll 4178  ax-sep 4181  ax-nul 4189  ax-pow 4237  ax-pr 4272  ax-un 4501  ax-setind 4606  ax-iinf 4657  ax-cnex 8058  ax-resscn 8059  ax-1cn 8060  ax-1re 8061  ax-icn 8062  ax-addcl 8063  ax-addrcl 8064  ax-mulcl 8065  ax-mulrcl 8066  ax-addcom 8067  ax-mulcom 8068  ax-addass 8069  ax-mulass 8070  ax-distr 8071  ax-i2m1 8072  ax-0lt1 8073  ax-1rid 8074  ax-0id 8075  ax-rnegex 8076  ax-precex 8077  ax-cnre 8078  ax-pre-ltirr 8079  ax-pre-ltwlin 8080  ax-pre-lttrn 8081  ax-pre-apti 8082  ax-pre-ltadd 8083  ax-pre-mulgt0 8084  ax-pre-mulext 8085

This theorem depends on definitions:  df-bi 117  df-3or 984  df-3an 985  df-tru 1378  df-fal 1381  df-nf 1487  df-sb 1789  df-eu 2060  df-mo 2061  df-clab 2196  df-cleq 2202  df-clel 2205  df-nfc 2341  df-ne 2381  df-nel 2476  df-ral 2493  df-rex 2494  df-reu 2495  df-rmo 2496  df-rab 2497  df-v 2781  df-sbc 3009  df-csb 3105  df-dif 3179  df-un 3181  df-in 3183  df-ss 3190  df-nul 3472  df-pw 3631  df-sn 3652  df-pr 3653  df-op 3655  df-uni 3868  df-int 3903  df-iun 3946  df-br 4063  df-opab 4125  df-mpt 4126  df-tr 4162  df-id 4361  df-po 4364  df-iso 4365  df-iord 4434  df-on 4436  df-ilim 4437  df-suc 4439  df-iom 4660  df-xp 4702  df-rel 4703  df-cnv 4704  df-co 4705  df-dm 4706  df-rn 4707  df-res 4708  df-ima 4709  df-iota 5254  df-fun 5296  df-fn 5297  df-f 5298  df-f1 5299  df-fo 5300  df-f1o 5301  df-fv 5302  df-riota 5927  df-ov 5977  df-oprab 5978  df-mpo 5979  df-1st 6256  df-2nd 6257  df-recs 6421  df-frec 6507  df-pnf 8151  df-mnf 8152  df-xr 8153  df-ltxr 8154  df-le 8155  df-sub 8287  df-neg 8288  df-reap 8690  df-ap 8697  df-div 8788  df-inn 9079  df-n0 9338  df-z 9415  df-uz 9691  df-fz 10173  df-fzo 10307  df-seqfrec 10637

This theorem is referenced by: (None)