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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 14600 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝐾 ∈ ℕ0) → (𝐶 FallFac (𝐾 + 1)) = ((𝐶 FallFac 𝐾) · (𝐶 − 𝐾))) | |
4 | 1, 2, 3 | syl2anc 691 | . . . 4 ⊢ (𝜑 → (𝐶 FallFac (𝐾 + 1)) = ((𝐶 FallFac 𝐾) · (𝐶 − 𝐾))) |
5 | facp1 12927 | . . . . 5 ⊢ (𝐾 ∈ ℕ0 → (!‘(𝐾 + 1)) = ((!‘𝐾) · (𝐾 + 1))) | |
6 | 2, 5 | syl 17 | . . . 4 ⊢ (𝜑 → (!‘(𝐾 + 1)) = ((!‘𝐾) · (𝐾 + 1))) |
7 | 4, 6 | oveq12d 6567 | . . 3 ⊢ (𝜑 → ((𝐶 FallFac (𝐾 + 1)) / (!‘(𝐾 + 1))) = (((𝐶 FallFac 𝐾) · (𝐶 − 𝐾)) / ((!‘𝐾) · (𝐾 + 1)))) |
8 | peano2nn0 11210 | . . . . 5 ⊢ (𝐾 ∈ ℕ0 → (𝐾 + 1) ∈ ℕ0) | |
9 | 2, 8 | syl 17 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ∈ ℕ0) |
10 | 1, 9 | bccval 37559 | . . 3 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = ((𝐶 FallFac (𝐾 + 1)) / (!‘(𝐾 + 1)))) |
11 | fallfaccl 14586 | . . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝐾 ∈ ℕ0) → (𝐶 FallFac 𝐾) ∈ ℂ) | |
12 | 1, 2, 11 | syl2anc 691 | . . . 4 ⊢ (𝜑 → (𝐶 FallFac 𝐾) ∈ ℂ) |
13 | faccl 12932 | . . . . . 6 ⊢ (𝐾 ∈ ℕ0 → (!‘𝐾) ∈ ℕ) | |
14 | 2, 13 | syl 17 | . . . . 5 ⊢ (𝜑 → (!‘𝐾) ∈ ℕ) |
15 | 14 | nncnd 10913 | . . . 4 ⊢ (𝜑 → (!‘𝐾) ∈ ℂ) |
16 | 2 | nn0cnd 11230 | . . . . 5 ⊢ (𝜑 → 𝐾 ∈ ℂ) |
17 | 1, 16 | subcld 10271 | . . . 4 ⊢ (𝜑 → (𝐶 − 𝐾) ∈ ℂ) |
18 | 9 | nn0cnd 11230 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ∈ ℂ) |
19 | 14 | nnne0d 10942 | . . . 4 ⊢ (𝜑 → (!‘𝐾) ≠ 0) |
20 | nn0p1nn 11209 | . . . . . 6 ⊢ (𝐾 ∈ ℕ0 → (𝐾 + 1) ∈ ℕ) | |
21 | 2, 20 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝐾 + 1) ∈ ℕ) |
22 | 21 | nnne0d 10942 | . . . 4 ⊢ (𝜑 → (𝐾 + 1) ≠ 0) |
23 | 12, 15, 17, 18, 19, 22 | divmuldivd 10721 | . . 3 ⊢ (𝜑 → (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1))) = (((𝐶 FallFac 𝐾) · (𝐶 − 𝐾)) / ((!‘𝐾) · (𝐾 + 1)))) |
24 | 7, 10, 23 | 3eqtr4d 2654 | . 2 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
25 | 1, 2 | bccval 37559 | . . 3 ⊢ (𝜑 → (𝐶C𝑐𝐾) = ((𝐶 FallFac 𝐾) / (!‘𝐾))) |
26 | 25 | oveq1d 6564 | . 2 ⊢ (𝜑 → ((𝐶C𝑐𝐾) · ((𝐶 − 𝐾) / (𝐾 + 1))) = (((𝐶 FallFac 𝐾) / (!‘𝐾)) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
27 | 24, 26 | eqtr4d 2647 | 1 ⊢ (𝜑 → (𝐶C𝑐(𝐾 + 1)) = ((𝐶C𝑐𝐾) · ((𝐶 − 𝐾) / (𝐾 + 1)))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1475 ∈ wcel 1977 ‘cfv 5804 (class class class)co 6549 ℂcc 9813 1c1 9816 + caddc 9818 · cmul 9820 − cmin 10145 / cdiv 10563 ℕcn 10897 ℕ0cn0 11169 !cfa 12922 FallFac cfallfac 14574 C𝑐cbcc 37557 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-oi 8298 df-card 8648 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-fz 12198 df-fzo 12335 df-seq 12664 df-exp 12723 df-fac 12923 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-prod 14475 df-fallfac 14577 df-bcc 37558 |
This theorem is referenced by: bccm1k 37563 bccn1 37565 binomcxplemfrat 37572 binomcxplemnotnn0 37577 |
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