Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 11 - Section 11.4 - The Binomial Theorem - Exercise Set - Page 864: 2



Work Step by Step

Formula to calculate the Binomial Coefficient is: $\displaystyle \binom{n}{k}=\dfrac{n!}{k!(n-k)!}$ Let's see how this formula works: $\displaystyle \binom{7}{2}=\dfrac{7!}{2!(7-2)!}=\dfrac{ 7 \cdot 6 \cdot 5!}{ 2 \cdot 1 \times 5!}=21$
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