Show that the identity k n = n 72 n k k-1, olds for all integers 1
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
![Show that the identity
\[
k \binom{n}{k} = n \binom{n-1}{k-1}
\]
holds for all integers \(1 \leq k < n\) and use it to prove that
\[
n \mid \binom{n}{k} \quad \text{if} \quad \gcd(k, n) = 1.
\]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Feabade52-5174-4cc3-8205-365538407c90%2F2ae7c95d-3546-42ed-aa1b-d8488b30aaeb%2Fz0n0jdx_processed.png&w=3840&q=75)
Transcribed Image Text:Show that the identity
\[
k \binom{n}{k} = n \binom{n-1}{k-1}
\]
holds for all integers \(1 \leq k < n\) and use it to prove that
\[
n \mid \binom{n}{k} \quad \text{if} \quad \gcd(k, n) = 1.
\]
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