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| Mirrors > Home > MPE Home > Th. List > pwm1geoser | Structured version Visualization version 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.) (Proof shortened by AV, 19-Aug-2021.) |
| Ref | Expression |
|---|---|
| pwm1geoser.a | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| pwm1geoser.n | ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| Ref | Expression |
|---|---|
| pwm1geoser | ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pwm1geoser.n | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℕ0) | |
| 2 | 1 | nn0zd 12627 | . . . . 5 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 3 | 1exp 14140 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (1↑𝑁) = 1) | |
| 4 | 2, 3 | syl 18 | . . . 4 ⊢ (𝜑 → (1↑𝑁) = 1) |
| 5 | 4 | eqcomd 2771 | . . 3 ⊢ (𝜑 → 1 = (1↑𝑁)) |
| 6 | 5 | oveq2d 7432 | . 2 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴↑𝑁) − (1↑𝑁))) |
| 7 | pwm1geoser.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 8 | 1cnd 11213 | . . 3 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 9 | pwdif 15940 | . . 3 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝐴 ∈ ℂ ∧ 1 ∈ ℂ) → ((𝐴↑𝑁) − (1↑𝑁)) = ((𝐴 − 1) · Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))))) | |
| 10 | 1, 7, 8, 9 | syl3anc 1398 | . 2 ⊢ (𝜑 → ((𝐴↑𝑁) − (1↑𝑁)) = ((𝐴 − 1) · Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))))) |
| 11 | fzoval 13700 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (0..^𝑁) = (0...(𝑁 − 1))) | |
| 12 | 2, 11 | syl 18 | . . . 4 ⊢ (𝜑 → (0..^𝑁) = (0...(𝑁 − 1))) |
| 13 | 2 | adantr 486 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑁 ∈ ℤ) |
| 14 | elfzoelz 13699 | . . . . . . . . 9 ⊢ (𝑘 ∈ (0..^𝑁) → 𝑘 ∈ ℤ) | |
| 15 | 14 | adantl 487 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑘 ∈ ℤ) |
| 16 | 13, 15 | zsubcld 12716 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (𝑁 − 𝑘) ∈ ℤ) |
| 17 | peano2zm 12648 | . . . . . . 7 ⊢ ((𝑁 − 𝑘) ∈ ℤ → ((𝑁 − 𝑘) − 1) ∈ ℤ) | |
| 18 | 1exp 14140 | . . . . . . 7 ⊢ (((𝑁 − 𝑘) − 1) ∈ ℤ → (1↑((𝑁 − 𝑘) − 1)) = 1) | |
| 19 | 16, 17, 18 | 3syl 19 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (1↑((𝑁 − 𝑘) − 1)) = 1) |
| 20 | 19 | oveq2d 7432 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = ((𝐴↑𝑘) · 1)) |
| 21 | 7 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝐴 ∈ ℂ) |
| 22 | elfzonn0 13748 | . . . . . . . 8 ⊢ (𝑘 ∈ (0..^𝑁) → 𝑘 ∈ ℕ0) | |
| 23 | 22 | adantl 487 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑘 ∈ ℕ0) |
| 24 | 21, 23 | expcld 14195 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (𝐴↑𝑘) ∈ ℂ) |
| 25 | 24 | mulridd 11237 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · 1) = (𝐴↑𝑘)) |
| 26 | 20, 25 | eqtrd 2800 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = (𝐴↑𝑘)) |
| 27 | 12, 26 | sumeq12dv 15775 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)) |
| 28 | 27 | oveq2d 7432 | . 2 ⊢ (𝜑 → ((𝐴 − 1) · Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1)))) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| 29 | 6, 10, 28 | 3eqtrd 2804 | 1 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 (class class class)co 7416 ℂcc 11109 0cc0 11111 1c1 11112 · cmul 11116 − cmin 11452 ℕ0cn0 12515 ℤcz 12602 ...cfz 13546 ..^cfzo 13694 ↑cexp 14110 Σcsu 15756 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-inf2 9613 ax-cnex 11167 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 ax-pre-mulgt0 11188 ax-pre-sup 11189 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7865 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-sup 9405 df-oi 9475 df-card 9937 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11454 df-neg 11455 df-div 11883 df-nn 12245 df-2 12314 df-3 12315 df-n0 12516 df-z 12603 df-uz 12874 df-rp 13028 df-fz 13547 df-fzo 13695 df-seq 14051 df-exp 14111 df-hash 14380 df-cj 15169 df-re 15170 df-im 15171 df-sqrt 15305 df-abs 15306 df-clim 15558 df-sum 15757 |
| This theorem is used by: lighneallem3 48392 |
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