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| Mirrors > Home > ILE Home > Th. List > pwm1geoserap1 | GIF version | ||
| Description: The n-th power of a number decreased by 1 expressed by the finite geometric series 1 + 𝐴↑1 + 𝐴↑2 +... + 𝐴↑(𝑁 − 1). (Contributed by AV, 14-Aug-2021.) (Revised by Jim Kingdon, 24-Oct-2022.) |
| Ref | Expression |
|---|---|
| pwm1geoser.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| pwm1geoser.3 | ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| pwm1geoserap1.ap | ⊢ (𝜑 → 𝐴 # 1) |
| Ref | Expression |
|---|---|
| pwm1geoserap1 | ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pwm1geoser.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | pwm1geoserap1.ap | . . 3 ⊢ (𝜑 → 𝐴 # 1) | |
| 3 | pwm1geoser.3 | . . 3 ⊢ (𝜑 → 𝑁 ∈ ℕ0) | |
| 4 | 1, 2, 3 | geoserap 12218 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) = ((1 − (𝐴↑𝑁)) / (1 − 𝐴))) |
| 5 | eqcom 2236 | . . 3 ⊢ (Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) = ((1 − (𝐴↑𝑁)) / (1 − 𝐴)) ↔ ((1 − (𝐴↑𝑁)) / (1 − 𝐴)) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)) | |
| 6 | 1cnd 8306 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 7 | 1, 3 | expcld 11060 | . . . . . 6 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℂ) |
| 8 | apsym 8897 | . . . . . . . 8 ⊢ ((𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → (𝐴 # 1 ↔ 1 # 𝐴)) | |
| 9 | 1, 6, 8 | syl2anc 411 | . . . . . . 7 ⊢ (𝜑 → (𝐴 # 1 ↔ 1 # 𝐴)) |
| 10 | 2, 9 | mpbid 147 | . . . . . 6 ⊢ (𝜑 → 1 # 𝐴) |
| 11 | 6, 7, 6, 1, 10 | div2subapd 9129 | . . . . 5 ⊢ (𝜑 → ((1 − (𝐴↑𝑁)) / (1 − 𝐴)) = (((𝐴↑𝑁) − 1) / (𝐴 − 1))) |
| 12 | 11 | eqeq1d 2243 | . . . 4 ⊢ (𝜑 → (((1 − (𝐴↑𝑁)) / (1 − 𝐴)) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) ↔ (((𝐴↑𝑁) − 1) / (𝐴 − 1)) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| 13 | peano2cnm 8555 | . . . . . 6 ⊢ ((𝐴↑𝑁) ∈ ℂ → ((𝐴↑𝑁) − 1) ∈ ℂ) | |
| 14 | 7, 13 | syl 14 | . . . . 5 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) ∈ ℂ) |
| 15 | 0zd 9606 | . . . . . . 7 ⊢ (𝜑 → 0 ∈ ℤ) | |
| 16 | 3 | nn0zd 9716 | . . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 17 | peano2zm 9632 | . . . . . . . 8 ⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈ ℤ) | |
| 18 | 16, 17 | syl 14 | . . . . . . 7 ⊢ (𝜑 → (𝑁 − 1) ∈ ℤ) |
| 19 | 15, 18 | fzfigd 10817 | . . . . . 6 ⊢ (𝜑 → (0...(𝑁 − 1)) ∈ Fin) |
| 20 | 1 | adantr 276 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝐴 ∈ ℂ) |
| 21 | elfznn0 10470 | . . . . . . . 8 ⊢ (𝑘 ∈ (0...(𝑁 − 1)) → 𝑘 ∈ ℕ0) | |
| 22 | 21 | adantl 277 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝑘 ∈ ℕ0) |
| 23 | 20, 22 | expcld 11060 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → (𝐴↑𝑘) ∈ ℂ) |
| 24 | 19, 23 | fsumcl 12111 | . . . . 5 ⊢ (𝜑 → Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) ∈ ℂ) |
| 25 | peano2cnm 8555 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴 − 1) ∈ ℂ) | |
| 26 | 1, 25 | syl 14 | . . . . 5 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 27 | 1, 6, 2 | subap0d 8935 | . . . . 5 ⊢ (𝜑 → (𝐴 − 1) # 0) |
| 28 | 14, 24, 26, 27 | divmulap2d 9115 | . . . 4 ⊢ (𝜑 → ((((𝐴↑𝑁) − 1) / (𝐴 − 1)) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) ↔ ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)))) |
| 29 | 12, 28 | bitrd 188 | . . 3 ⊢ (𝜑 → (((1 − (𝐴↑𝑁)) / (1 − 𝐴)) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) ↔ ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)))) |
| 30 | 5, 29 | bitrid 192 | . 2 ⊢ (𝜑 → (Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) = ((1 − (𝐴↑𝑁)) / (1 − 𝐴)) ↔ ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)))) |
| 31 | 4, 30 | mpbid 147 | 1 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2205 class class class wbr 4114 (class class class)co 6058 ℂcc 8141 0cc0 8143 1c1 8144 · cmul 8148 − cmin 8460 # cap 8872 / cdiv 8963 ℕ0cn0 9513 ℤcz 9594 ...cfz 10361 ↑cexp 10924 Σcsu 12063 |
| 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 4230 ax-sep 4233 ax-nul 4241 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-iinf 4715 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-mulrcl 8242 ax-addcom 8243 ax-mulcom 8244 ax-addass 8245 ax-mulass 8246 ax-distr 8247 ax-i2m1 8248 ax-0lt1 8249 ax-1rid 8250 ax-0id 8251 ax-rnegex 8252 ax-precex 8253 ax-cnre 8254 ax-pre-ltirr 8255 ax-pre-ltwlin 8256 ax-pre-lttrn 8257 ax-pre-apti 8258 ax-pre-ltadd 8259 ax-pre-mulgt0 8260 ax-pre-mulext 8261 ax-arch 8262 ax-caucvg 8263 |
| This theorem depends on definitions: df-bi 117 df-dc 843 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 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-nul 3513 df-if 3625 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-tr 4214 df-id 4419 df-po 4422 df-iso 4423 df-iord 4492 df-on 4494 df-ilim 4495 df-suc 4497 df-iom 4718 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-isom 5366 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-1st 6347 df-2nd 6348 df-recs 6549 df-irdg 6614 df-frec 6635 df-1o 6660 df-oadd 6664 df-er 6780 df-en 6989 df-dom 6990 df-fin 6991 df-pnf 8326 df-mnf 8327 df-xr 8328 df-ltxr 8329 df-le 8330 df-sub 8462 df-neg 8463 df-reap 8866 df-ap 8873 df-div 8964 df-inn 9255 df-2 9313 df-3 9314 df-4 9315 df-n0 9514 df-z 9595 df-uz 9872 df-q 9970 df-rp 10005 df-fz 10362 df-fzo 10499 df-seqfrec 10834 df-exp 10925 df-ihash 11164 df-cj 11552 df-re 11553 df-im 11554 df-rsqrt 11708 df-abs 11709 df-clim 11989 df-sumdc 12064 |
| This theorem is referenced by: (None) |
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