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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bccp1k | Structured version Visualization version GIF version | ||
| Description: Generalized binomial coefficient: 𝐶 choose (𝐾 + 1). (Contributed by Steve Rodriguez, 22-Apr-2020.) |
| Ref | Expression |
|---|---|
| bccval.c | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| bccval.k | ⊢ (𝜑 → 𝐾 ∈ ℕ0) |
| Ref | Expression |
|---|---|
| bccp1k | ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = ((𝐶C𝑐𝐾) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bccval.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 2 | bccval.k | . . . . 5 ⊢ (𝜑 → 𝐾 ∈ ℕ0) | |
| 3 | fallfacp1 15953 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝐾 ∈ ℕ0) → (𝐶 FallFac (𝐾 + 1)) = ((𝐶 FallFac 𝐾) · (𝐶 − 𝐾))) | |
| 4 | 1, 2, 3 | syl2anc 584 | . . . 4 ⊢ (𝜑 → (𝐶 FallFac (𝐾 + 1)) = ((𝐶 FallFac 𝐾) · (𝐶 − 𝐾))) |
| 5 | facp1 14201 | . . . . 5 ⊢ (𝐾 ∈ ℕ0 → (!‘(𝐾 + 1)) = ((!‘𝐾) · (𝐾 + 1))) | |
| 6 | 2, 5 | syl 17 | . . . 4 ⊢ (𝜑 → (!‘(𝐾 + 1)) = ((!‘𝐾) · (𝐾 + 1))) |
| 7 | 4, 6 | oveq12d 7376 | . . 3 ⊢ (𝜑 → ((𝐶 FallFac (𝐾 + 1)) / (!‘(𝐾 + 1))) = (((𝐶 FallFac 𝐾) · (𝐶 − 𝐾)) / ((!‘𝐾) · (𝐾 + 1)))) |
| 8 | peano2nn0 12441 | . . . . 5 ⊢ (𝐾 ∈ ℕ0 → (𝐾 + 1) ∈ ℕ0) | |
| 9 | 2, 8 | syl 17 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ∈ ℕ0) |
| 10 | 1, 9 | bccval 44575 | . . 3 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = ((𝐶 FallFac (𝐾 + 1)) / (!‘(𝐾 + 1)))) |
| 11 | fallfaccl 15939 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝐾 ∈ ℕ0) → (𝐶 FallFac 𝐾) ∈ ℂ) | |
| 12 | 1, 2, 11 | syl2anc 584 | . . . 4 ⊢ (𝜑 → (𝐶 FallFac 𝐾) ∈ ℂ) |
| 13 | faccl 14206 | . . . . . 6 ⊢ (𝐾 ∈ ℕ0 → (!‘𝐾) ∈ ℕ) | |
| 14 | 2, 13 | syl 17 | . . . . 5 ⊢ (𝜑 → (!‘𝐾) ∈ ℕ) |
| 15 | 14 | nncnd 12161 | . . . 4 ⊢ (𝜑 → (!‘𝐾) ∈ ℂ) |
| 16 | 2 | nn0cnd 12464 | . . . . 5 ⊢ (𝜑 → 𝐾 ∈ ℂ) |
| 17 | 1, 16 | subcld 11492 | . . . 4 ⊢ (𝜑 → (𝐶 − 𝐾) ∈ ℂ) |
| 18 | 9 | nn0cnd 12464 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ∈ ℂ) |
| 19 | 14 | nnne0d 12195 | . . . 4 ⊢ (𝜑 → (!‘𝐾) ≠ 0) |
| 20 | nn0p1nn 12440 | . . . . . 6 ⊢ (𝐾 ∈ ℕ0 → (𝐾 + 1) ∈ ℕ) | |
| 21 | 2, 20 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝐾 + 1) ∈ ℕ) |
| 22 | 21 | nnne0d 12195 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ≠ 0) |
| 23 | 12, 15, 17, 18, 19, 22 | divmuldivd 11958 | . . 3 ⊢ (𝜑 → (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1))) = (((𝐶 FallFac 𝐾) · (𝐶 − 𝐾)) / ((!‘𝐾) · (𝐾 + 1)))) |
| 24 | 7, 10, 23 | 3eqtr4d 2781 | . 2 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
| 25 | 1, 2 | bccval 44575 | . . 3 ⊢ (𝜑 → (𝐶C𝑐𝐾) = ((𝐶 FallFac 𝐾) / (!‘𝐾))) |
| 26 | 25 | oveq1d 7373 | . 2 ⊢ (𝜑 → ((𝐶C𝑐𝐾) · ((𝐶 − 𝐾) / (𝐾 + 1))) = (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
| 27 | 24, 26 | eqtr4d 2774 | 1 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = ((𝐶C𝑐𝐾) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 ‘cfv 6492 (class class class)co 7358 ℂcc 11024 1c1 11027 + caddc 11029 · cmul 11031 − cmin 11364 / cdiv 11794 ℕcn 12145 ℕ0cn0 12401 !cfa 14196 FallFac cfallfac 15927 C𝑐cbcc 44573 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-inf2 9550 ax-cnex 11082 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 ax-pre-sup 11104 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-int 4903 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-er 8635 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-sup 9345 df-oi 9415 df-card 9851 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-div 11795 df-nn 12146 df-2 12208 df-3 12209 df-n0 12402 df-z 12489 df-uz 12752 df-rp 12906 df-fz 13424 df-fzo 13571 df-seq 13925 df-exp 13985 df-fac 14197 df-hash 14254 df-cj 15022 df-re 15023 df-im 15024 df-sqrt 15158 df-abs 15159 df-clim 15411 df-prod 15827 df-fallfac 15930 df-bcc 44574 |
| This theorem is referenced by: bccm1k 44579 bccn1 44581 binomcxplemfrat 44588 binomcxplemnotnn0 44593 |
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