Theorem prodfdivap 12241

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 10361	. . . . 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 2234	. . . . . 6 ⊢ (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))) = (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))
7		fveq2 5672	. . . . . . 7 ⊢ (𝑛 = 𝑘 → (𝐺‘𝑛) = (𝐺‘𝑘))
8	7	oveq2d 6068	. . . . . 6 ⊢ (𝑛 = 𝑘 → (1 / (𝐺‘𝑛)) = (1 / (𝐺‘𝑘)))
9		simpr 110	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → 𝑘 ∈ (ℤ≥‘𝑀))
10	2, 4	recclapd 9060	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (1 / (𝐺‘𝑘)) ∈ ℂ)
11	6, 8, 9, 10	fvmptd3 5773	. . . . 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 2311	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) ∈ ℂ)
14	1, 2, 5, 12, 13	prodfrecap 12240	. . 3 ⊢ (𝜑 → (seq𝑀( · , (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))))‘𝑁) = (1 / (seq𝑀( · , 𝐺)‘𝑁)))
15	14	oveq2d 6068	. 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 2295	. . . . . . . . 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 5672	. . . . . . . . 9 ⊢ (𝑘 = 𝑛 → (𝐺‘𝑘) = (𝐺‘𝑛))
20	19	eleq1d 2303	. . . . . . . 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 1960	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) ∈ ℂ)
23	19	breq1d 4121	. . . . . . . 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 1960	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (𝐺‘𝑛) # 0)
26	22, 25	recclapd 9060	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℤ≥‘𝑀)) → (1 / (𝐺‘𝑛)) ∈ ℂ)
27	26	fmpttd 5834	. . . 4 ⊢ (𝜑 → (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))):(ℤ≥‘𝑀)⟶ℂ)
28	27	ffvelcdmda 5814	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘) ∈ ℂ)
29	16, 2, 4	divrecapd 9072	. . . 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 6068	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → ((𝐹‘𝑘) · ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘)) = ((𝐹‘𝑘) · (1 / (𝐺‘𝑘))))
32	29, 30, 31	3eqtr4d 2277	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (𝐻‘𝑘) = ((𝐹‘𝑘) · ((𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛)))‘𝑘)))
33	1, 16, 28, 32	prod3fmul 12235	. 2 ⊢ (𝜑 → (seq𝑀( · , 𝐻)‘𝑁) = ((seq𝑀( · , 𝐹)‘𝑁) · (seq𝑀( · , (𝑛 ∈ (ℤ≥‘𝑀) ↦ (1 / (𝐺‘𝑛))))‘𝑁)))
34		eqid 2234	. . . . 5 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀)
35		eluzel2 9864	. . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ)
36	1, 35	syl 14	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℤ)
37	34, 36, 16	prodf 12232	. . . 4 ⊢ (𝜑 → seq𝑀( · , 𝐹):(ℤ≥‘𝑀)⟶ℂ)
38	37, 1	ffvelcdmd 5815	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐹)‘𝑁) ∈ ℂ)
39	34, 36, 2	prodf 12232	. . . 4 ⊢ (𝜑 → seq𝑀( · , 𝐺):(ℤ≥‘𝑀)⟶ℂ)
40	39, 1	ffvelcdmd 5815	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐺)‘𝑁) ∈ ℂ)
41	1, 2, 5	prodfap0 12239	. . 3 ⊢ (𝜑 → (seq𝑀( · , 𝐺)‘𝑁) # 0)
42	38, 40, 41	divrecapd 9072	. 2 ⊢ (𝜑 → ((seq𝑀( · , 𝐹)‘𝑁) / (seq𝑀( · , 𝐺)‘𝑁)) = ((seq𝑀( · , 𝐹)‘𝑁) · (1 / (seq𝑀( · , 𝐺)‘𝑁))))
43	15, 33, 42	3eqtr4d 2277	1 ⊢ (𝜑 → (seq𝑀( · , 𝐻)‘𝑁) = ((seq𝑀( · , 𝐹)‘𝑁) / (seq𝑀( · , 𝐺)‘𝑁)))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2205   class class class wbr 4111   ↦ cmpt 4173  ‘cfv 5354  (class class class)co 6052  ℂcc 8130  0cc0 8132  1c1 8133   · cmul 8137   # cap 8860   / cdiv 8951  ℤcz 9582  ℤ_≥cuz 9859  ...cfz 10348  seqcseq 10816

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-coll 4227  ax-sep 4230  ax-nul 4238  ax-pow 4289  ax-pr 4324  ax-un 4556  ax-setind 4661  ax-iinf 4712  ax-cnex 8223  ax-resscn 8224  ax-1cn 8225  ax-1re 8226  ax-icn 8227  ax-addcl 8228  ax-addrcl 8229  ax-mulcl 8230  ax-mulrcl 8231  ax-addcom 8232  ax-mulcom 8233  ax-addass 8234  ax-mulass 8235  ax-distr 8236  ax-i2m1 8237  ax-0lt1 8238  ax-1rid 8239  ax-0id 8240  ax-rnegex 8241  ax-precex 8242  ax-cnre 8243  ax-pre-ltirr 8244  ax-pre-ltwlin 8245  ax-pre-lttrn 8246  ax-pre-apti 8247  ax-pre-ltadd 8248  ax-pre-mulgt0 8249  ax-pre-mulext 8250

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3045  df-csb 3141  df-dif 3215  df-un 3217  df-in 3219  df-ss 3226  df-nul 3511  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-int 3952  df-iun 3995  df-br 4112  df-opab 4174  df-mpt 4175  df-tr 4211  df-id 4416  df-po 4419  df-iso 4420  df-iord 4489  df-on 4491  df-ilim 4492  df-suc 4494  df-iom 4715  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-res 4763  df-ima 4764  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362  df-riota 6005  df-ov 6055  df-oprab 6056  df-mpo 6057  df-1st 6336  df-2nd 6337  df-recs 6538  df-frec 6624  df-pnf 8315  df-mnf 8316  df-xr 8317  df-ltxr 8318  df-le 8319  df-sub 8451  df-neg 8452  df-reap 8854  df-ap 8861  df-div 8952  df-inn 9243  df-n0 9502  df-z 9583  df-uz 9860  df-fz 10349  df-fzo 10484  df-seqfrec 10817

This theorem is referenced by: (None)