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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 12544 | . . . . 5 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 3 | 1exp 14048 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (1↑𝑁) = 1) | |
| 4 | 2, 3 | syl 17 | . . . 4 ⊢ (𝜑 → (1↑𝑁) = 1) |
| 5 | 4 | eqcomd 2747 | . . 3 ⊢ (𝜑 → 1 = (1↑𝑁)) |
| 6 | 5 | oveq2d 7375 | . 2 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴↑𝑁) − (1↑𝑁))) |
| 7 | pwm1geoser.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 8 | 1cnd 11135 | . . 3 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 9 | pwdif 15828 | . . 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 1380 | . 2 ⊢ (𝜑 → ((𝐴↑𝑁) − (1↑𝑁)) = ((𝐴 − 1) · Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))))) |
| 11 | fzoval 13609 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (0..^𝑁) = (0...(𝑁 − 1))) | |
| 12 | 2, 11 | syl 17 | . . . 4 ⊢ (𝜑 → (0..^𝑁) = (0...(𝑁 − 1))) |
| 13 | 2 | adantr 482 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑁 ∈ ℤ) |
| 14 | elfzoelz 13608 | . . . . . . . . 9 ⊢ (𝑘 ∈ (0..^𝑁) → 𝑘 ∈ ℤ) | |
| 15 | 14 | adantl 483 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑘 ∈ ℤ) |
| 16 | 13, 15 | zsubcld 12633 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (𝑁 − 𝑘) ∈ ℤ) |
| 17 | peano2zm 12565 | . . . . . . 7 ⊢ ((𝑁 − 𝑘) ∈ ℤ → ((𝑁 − 𝑘) − 1) ∈ ℤ) | |
| 18 | 1exp 14048 | . . . . . . 7 ⊢ (((𝑁 − 𝑘) − 1) ∈ ℤ → (1↑((𝑁 − 𝑘) − 1)) = 1) | |
| 19 | 16, 17, 18 | 3syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (1↑((𝑁 − 𝑘) − 1)) = 1) |
| 20 | 19 | oveq2d 7375 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = ((𝐴↑𝑘) · 1)) |
| 21 | 7 | adantr 482 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝐴 ∈ ℂ) |
| 22 | elfzonn0 13657 | . . . . . . . 8 ⊢ (𝑘 ∈ (0..^𝑁) → 𝑘 ∈ ℕ0) | |
| 23 | 22 | adantl 483 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → 𝑘 ∈ ℕ0) |
| 24 | 21, 23 | expcld 14103 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → (𝐴↑𝑘) ∈ ℂ) |
| 25 | 24 | mulridd 11158 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · 1) = (𝐴↑𝑘)) |
| 26 | 20, 25 | eqtrd 2776 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0..^𝑁)) → ((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = (𝐴↑𝑘)) |
| 27 | 12, 26 | sumeq12dv 15663 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ (0..^𝑁)((𝐴↑𝑘) · (1↑((𝑁 − 𝑘) − 1))) = Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘)) |
| 28 | 27 | oveq2d 7375 | . 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 2780 | 1 ⊢ (𝜑 → ((𝐴↑𝑁) − 1) = ((𝐴 − 1) · Σ𝑘 ∈ (0...(𝑁 − 1))(𝐴↑𝑘))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 = wceq 1548 ∈ wcel 2121 (class class class)co 7359 ℂcc 11032 0cc0 11034 1c1 11035 · cmul 11039 − cmin 11373 ℕ0cn0 12432 ℤcz 12519 ...cfz 13456 ..^cfzo 13603 ↑cexp 14018 Σcsu 15643 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5201 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7681 ax-inf2 9557 ax-cnex 11090 ax-resscn 11091 ax-1cn 11092 ax-icn 11093 ax-addcl 11094 ax-addrcl 11095 ax-mulcl 11096 ax-mulrcl 11097 ax-mulcom 11098 ax-addass 11099 ax-mulass 11100 ax-distr 11101 ax-i2m1 11102 ax-1ne0 11103 ax-1rid 11104 ax-rnegex 11105 ax-rrecex 11106 ax-cnre 11107 ax-pre-lttri 11108 ax-pre-lttrn 11109 ax-pre-ltadd 11110 ax-pre-mulgt0 11111 ax-pre-sup 11112 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3725 df-csb 3833 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-pss 3904 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-int 4880 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-se 5574 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6255 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-isom 6497 df-riota 7316 df-ov 7362 df-oprab 7363 df-mpo 7364 df-om 7810 df-1st 7933 df-2nd 7934 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8343 df-1o 8399 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-sup 9349 df-oi 9419 df-card 9858 df-pnf 11177 df-mnf 11178 df-xr 11179 df-ltxr 11180 df-le 11181 df-sub 11375 df-neg 11376 df-div 11804 df-nn 12170 df-2 12239 df-3 12240 df-n0 12433 df-z 12520 df-uz 12784 df-rp 12938 df-fz 13457 df-fzo 13604 df-seq 13959 df-exp 14019 df-hash 14288 df-cj 15056 df-re 15057 df-im 15058 df-sqrt 15192 df-abs 15193 df-clim 15445 df-sum 15644 |
| This theorem is referenced by: lighneallem3 48097 |
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