Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > geoserg | Structured version Visualization version GIF version |
Description: The value of the finite geometric series 𝐴↑𝑀 + 𝐴↑(𝑀 + 1) +... + 𝐴↑(𝑁 − 1). (Contributed by Mario Carneiro, 2-May-2016.) |
Ref | Expression |
---|---|
geoserg.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
geoserg.2 | ⊢ (𝜑 → 𝐴 ≠ 1) |
geoserg.3 | ⊢ (𝜑 → 𝑀 ∈ ℕ0) |
geoserg.4 | ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) |
Ref | Expression |
---|---|
geoserg | ⊢ (𝜑 → Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) = (((𝐴↑𝑀) − (𝐴↑𝑁)) / (1 − 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fzofi 13694 | . . . . . 6 ⊢ (𝑀..^𝑁) ∈ Fin | |
2 | 1 | a1i 11 | . . . . 5 ⊢ (𝜑 → (𝑀..^𝑁) ∈ Fin) |
3 | ax-1cn 10929 | . . . . . 6 ⊢ 1 ∈ ℂ | |
4 | geoserg.1 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
5 | subcl 11220 | . . . . . 6 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 − 𝐴) ∈ ℂ) | |
6 | 3, 4, 5 | sylancr 587 | . . . . 5 ⊢ (𝜑 → (1 − 𝐴) ∈ ℂ) |
7 | 4 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → 𝐴 ∈ ℂ) |
8 | geoserg.3 | . . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℕ0) | |
9 | elfzouz 13391 | . . . . . . 7 ⊢ (𝑘 ∈ (𝑀..^𝑁) → 𝑘 ∈ (ℤ≥‘𝑀)) | |
10 | eluznn0 12657 | . . . . . . 7 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → 𝑘 ∈ ℕ0) | |
11 | 8, 9, 10 | syl2an 596 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → 𝑘 ∈ ℕ0) |
12 | 7, 11 | expcld 13864 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (𝐴↑𝑘) ∈ ℂ) |
13 | 2, 6, 12 | fsummulc1 15497 | . . . 4 ⊢ (𝜑 → (Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) · (1 − 𝐴)) = Σ𝑘 ∈ (𝑀..^𝑁)((𝐴↑𝑘) · (1 − 𝐴))) |
14 | 3 | a1i 11 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → 1 ∈ ℂ) |
15 | 12, 14, 7 | subdid 11431 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ((𝐴↑𝑘) · (1 − 𝐴)) = (((𝐴↑𝑘) · 1) − ((𝐴↑𝑘) · 𝐴))) |
16 | 12 | mulid1d 10992 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ((𝐴↑𝑘) · 1) = (𝐴↑𝑘)) |
17 | 7, 11 | expp1d 13865 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (𝐴↑(𝑘 + 1)) = ((𝐴↑𝑘) · 𝐴)) |
18 | 17 | eqcomd 2744 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ((𝐴↑𝑘) · 𝐴) = (𝐴↑(𝑘 + 1))) |
19 | 16, 18 | oveq12d 7293 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → (((𝐴↑𝑘) · 1) − ((𝐴↑𝑘) · 𝐴)) = ((𝐴↑𝑘) − (𝐴↑(𝑘 + 1)))) |
20 | 15, 19 | eqtrd 2778 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀..^𝑁)) → ((𝐴↑𝑘) · (1 − 𝐴)) = ((𝐴↑𝑘) − (𝐴↑(𝑘 + 1)))) |
21 | 20 | sumeq2dv 15415 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀..^𝑁)((𝐴↑𝑘) · (1 − 𝐴)) = Σ𝑘 ∈ (𝑀..^𝑁)((𝐴↑𝑘) − (𝐴↑(𝑘 + 1)))) |
22 | oveq2 7283 | . . . . 5 ⊢ (𝑗 = 𝑘 → (𝐴↑𝑗) = (𝐴↑𝑘)) | |
23 | oveq2 7283 | . . . . 5 ⊢ (𝑗 = (𝑘 + 1) → (𝐴↑𝑗) = (𝐴↑(𝑘 + 1))) | |
24 | oveq2 7283 | . . . . 5 ⊢ (𝑗 = 𝑀 → (𝐴↑𝑗) = (𝐴↑𝑀)) | |
25 | oveq2 7283 | . . . . 5 ⊢ (𝑗 = 𝑁 → (𝐴↑𝑗) = (𝐴↑𝑁)) | |
26 | geoserg.4 | . . . . 5 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) | |
27 | 4 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (𝑀...𝑁)) → 𝐴 ∈ ℂ) |
28 | elfzuz 13252 | . . . . . . 7 ⊢ (𝑗 ∈ (𝑀...𝑁) → 𝑗 ∈ (ℤ≥‘𝑀)) | |
29 | eluznn0 12657 | . . . . . . 7 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑗 ∈ (ℤ≥‘𝑀)) → 𝑗 ∈ ℕ0) | |
30 | 8, 28, 29 | syl2an 596 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ (𝑀...𝑁)) → 𝑗 ∈ ℕ0) |
31 | 27, 30 | expcld 13864 | . . . . 5 ⊢ ((𝜑 ∧ 𝑗 ∈ (𝑀...𝑁)) → (𝐴↑𝑗) ∈ ℂ) |
32 | 22, 23, 24, 25, 26, 31 | telfsumo 15514 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀..^𝑁)((𝐴↑𝑘) − (𝐴↑(𝑘 + 1))) = ((𝐴↑𝑀) − (𝐴↑𝑁))) |
33 | 13, 21, 32 | 3eqtrrd 2783 | . . 3 ⊢ (𝜑 → ((𝐴↑𝑀) − (𝐴↑𝑁)) = (Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) · (1 − 𝐴))) |
34 | 4, 8 | expcld 13864 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑀) ∈ ℂ) |
35 | eluznn0 12657 | . . . . . . 7 ⊢ ((𝑀 ∈ ℕ0 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → 𝑁 ∈ ℕ0) | |
36 | 8, 26, 35 | syl2anc 584 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
37 | 4, 36 | expcld 13864 | . . . . 5 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℂ) |
38 | 34, 37 | subcld 11332 | . . . 4 ⊢ (𝜑 → ((𝐴↑𝑀) − (𝐴↑𝑁)) ∈ ℂ) |
39 | 2, 12 | fsumcl 15445 | . . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) ∈ ℂ) |
40 | geoserg.2 | . . . . . 6 ⊢ (𝜑 → 𝐴 ≠ 1) | |
41 | 40 | necomd 2999 | . . . . 5 ⊢ (𝜑 → 1 ≠ 𝐴) |
42 | subeq0 11247 | . . . . . . 7 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((1 − 𝐴) = 0 ↔ 1 = 𝐴)) | |
43 | 3, 4, 42 | sylancr 587 | . . . . . 6 ⊢ (𝜑 → ((1 − 𝐴) = 0 ↔ 1 = 𝐴)) |
44 | 43 | necon3bid 2988 | . . . . 5 ⊢ (𝜑 → ((1 − 𝐴) ≠ 0 ↔ 1 ≠ 𝐴)) |
45 | 41, 44 | mpbird 256 | . . . 4 ⊢ (𝜑 → (1 − 𝐴) ≠ 0) |
46 | 38, 39, 6, 45 | divmul3d 11785 | . . 3 ⊢ (𝜑 → ((((𝐴↑𝑀) − (𝐴↑𝑁)) / (1 − 𝐴)) = Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) ↔ ((𝐴↑𝑀) − (𝐴↑𝑁)) = (Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) · (1 − 𝐴)))) |
47 | 33, 46 | mpbird 256 | . 2 ⊢ (𝜑 → (((𝐴↑𝑀) − (𝐴↑𝑁)) / (1 − 𝐴)) = Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘)) |
48 | 47 | eqcomd 2744 | 1 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀..^𝑁)(𝐴↑𝑘) = (((𝐴↑𝑀) − (𝐴↑𝑁)) / (1 − 𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ‘cfv 6433 (class class class)co 7275 Fincfn 8733 ℂcc 10869 0cc0 10871 1c1 10872 + caddc 10874 · cmul 10876 − cmin 11205 / cdiv 11632 ℕ0cn0 12233 ℤ≥cuz 12582 ...cfz 13239 ..^cfzo 13382 ↑cexp 13782 Σcsu 15397 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 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 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-inf2 9399 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-se 5545 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-isom 6442 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-oi 9269 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-clim 15197 df-sum 15398 |
This theorem is referenced by: geoser 15579 rplogsumlem2 26633 rpvmasumlem 26635 dchrisum0flblem1 26656 |
Copyright terms: Public domain | W3C validator |