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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 11868 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) = ((1 − (𝐴↑𝑁)) / (1 − 𝐴))) |
| 5 | eqcom 2208 | . . 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 8101 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 7 | 1, 3 | expcld 10831 | . . . . . 6 ⊢ (𝜑 → (𝐴↑𝑁) ∈ ℂ) |
| 8 | apsym 8692 | . . . . . . . 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 8924 | . . . . 5 ⊢ (𝜑 → ((1 − (𝐴↑𝑁)) / (1 − 𝐴)) = (((𝐴↑𝑁) − 1) / (𝐴 − 1))) |
| 12 | 11 | eqeq1d 2215 | . . . 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 8351 | . . . . . 6 ⊢ ((𝐴↑𝑁) ∈ ℂ → ((𝐴↑𝑁) − 1) ∈ ℂ) | |
| 14 | 7, 13 | syl 14 | . . . . 5 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) ∈ ℂ) |
| 15 | 0zd 9397 | . . . . . . 7 ⊢ (𝜑 → 0 ∈ ℤ) | |
| 16 | 3 | nn0zd 9506 | . . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 17 | peano2zm 9423 | . . . . . . . 8 ⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈ ℤ) | |
| 18 | 16, 17 | syl 14 | . . . . . . 7 ⊢ (𝜑 → (𝑁 − 1) ∈ ℤ) |
| 19 | 15, 18 | fzfigd 10589 | . . . . . 6 ⊢ (𝜑 → (0...(𝑁 − 1)) ∈ Fin) |
| 20 | 1 | adantr 276 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝐴 ∈ ℂ) |
| 21 | elfznn0 10249 | . . . . . . . 8 ⊢ (𝑘 ∈ (0...(𝑁 − 1)) → 𝑘 ∈ ℕ0) | |
| 22 | 21 | adantl 277 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → 𝑘 ∈ ℕ0) |
| 23 | 20, 22 | expcld 10831 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 1))) → (𝐴↑𝑘) ∈ ℂ) |
| 24 | 19, 23 | fsumcl 11761 | . . . . 5 ⊢ (𝜑 → Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘) ∈ ℂ) |
| 25 | peano2cnm 8351 | . . . . . 6 ⊢ (𝐴 ∈ ℂ → (𝐴 − 1) ∈ ℂ) | |
| 26 | 1, 25 | syl 14 | . . . . 5 ⊢ (𝜑 → (𝐴 − 1) ∈ ℂ) |
| 27 | 1, 6, 2 | subap0d 8730 | . . . . 5 ⊢ (𝜑 → (𝐴 − 1) # 0) |
| 28 | 14, 24, 26, 27 | divmulap2d 8910 | . . . 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 1373 ∈ wcel 2177 class class class wbr 4048 (class class class)co 5954 ℂcc 7936 0cc0 7938 1c1 7939 · cmul 7943 − cmin 8256 # cap 8667 / cdiv 8758 ℕ0cn0 9308 ℤcz 9385 ...cfz 10143 ↑cexp 10696 Σcsu 11714 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-coll 4164 ax-sep 4167 ax-nul 4175 ax-pow 4223 ax-pr 4258 ax-un 4485 ax-setind 4590 ax-iinf 4641 ax-cnex 8029 ax-resscn 8030 ax-1cn 8031 ax-1re 8032 ax-icn 8033 ax-addcl 8034 ax-addrcl 8035 ax-mulcl 8036 ax-mulrcl 8037 ax-addcom 8038 ax-mulcom 8039 ax-addass 8040 ax-mulass 8041 ax-distr 8042 ax-i2m1 8043 ax-0lt1 8044 ax-1rid 8045 ax-0id 8046 ax-rnegex 8047 ax-precex 8048 ax-cnre 8049 ax-pre-ltirr 8050 ax-pre-ltwlin 8051 ax-pre-lttrn 8052 ax-pre-apti 8053 ax-pre-ltadd 8054 ax-pre-mulgt0 8055 ax-pre-mulext 8056 ax-arch 8057 ax-caucvg 8058 |
| This theorem depends on definitions: df-bi 117 df-dc 837 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ne 2378 df-nel 2473 df-ral 2490 df-rex 2491 df-reu 2492 df-rmo 2493 df-rab 2494 df-v 2775 df-sbc 3001 df-csb 3096 df-dif 3170 df-un 3172 df-in 3174 df-ss 3181 df-nul 3463 df-if 3574 df-pw 3620 df-sn 3641 df-pr 3642 df-op 3644 df-uni 3854 df-int 3889 df-iun 3932 df-br 4049 df-opab 4111 df-mpt 4112 df-tr 4148 df-id 4345 df-po 4348 df-iso 4349 df-iord 4418 df-on 4420 df-ilim 4421 df-suc 4423 df-iom 4644 df-xp 4686 df-rel 4687 df-cnv 4688 df-co 4689 df-dm 4690 df-rn 4691 df-res 4692 df-ima 4693 df-iota 5238 df-fun 5279 df-fn 5280 df-f 5281 df-f1 5282 df-fo 5283 df-f1o 5284 df-fv 5285 df-isom 5286 df-riota 5909 df-ov 5957 df-oprab 5958 df-mpo 5959 df-1st 6236 df-2nd 6237 df-recs 6401 df-irdg 6466 df-frec 6487 df-1o 6512 df-oadd 6516 df-er 6630 df-en 6838 df-dom 6839 df-fin 6840 df-pnf 8122 df-mnf 8123 df-xr 8124 df-ltxr 8125 df-le 8126 df-sub 8258 df-neg 8259 df-reap 8661 df-ap 8668 df-div 8759 df-inn 9050 df-2 9108 df-3 9109 df-4 9110 df-n0 9309 df-z 9386 df-uz 9662 df-q 9754 df-rp 9789 df-fz 10144 df-fzo 10278 df-seqfrec 10606 df-exp 10697 df-ihash 10934 df-cj 11203 df-re 11204 df-im 11205 df-rsqrt 11359 df-abs 11360 df-clim 11640 df-sumdc 11715 |
| This theorem is referenced by: (None) |
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