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nana54muller
15.02.2020 •
Mathematics
Consider the famous Gamma function, defined by Γ(x) = R [infinity] 0 t x−1 e −t dt. Using mathematical induction, prove that Γ(n + 1) = n! for any n ∈ N ∪ {0}, where n! = n(n − 1)· · · 3 · 2 · 1 is the usual factorial function
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Ответ:
See proof below
Step-by-step explanation:
The inductive proof consists on the following steps:
1) Base case: for n=0, we will prove that Γ(1)=0!=1. We have that
Hence the base case holds.
2) Inductive step: suppose that Γ(n + 1) = n! for some natural number n. We will prove that Γ((n + 1)+1) = (n+1)!
Use integration by parts, with the following parts:
u=t^{n+1}, du=(n+1)t^n
dv=e^{-t}, v=-e^{-t}
and we used the induction hypotheses on this last line. Also, -t^n e^-t tends to zero as n tends to infiity (the exponential decays faster than any polynomial).
We have proved the statement for n+1, and by mathematical induction, the statement holds for all n.
Ответ:
1/9 or 11%
Step-by-step explanation:
If she has 3 options for her way there, and 3 options on the way back, you do 3×3, which equals 9. If she only uses a cab once, it would be 1/9. If you need a percent, you do 1÷9, which equals 0.111111111. Then you multiply that by 100, which brings you to 11%.