Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 11 - Further Topics in Algebra - 11.4 The Binomial Theorem - 11.4 Exercises - Page 1045: 9


$\Rightarrow 5p^{4}q$

Work Step by Step

$\left( p+q\right) ^{5}=p^{5}+\binom 5 1 p^{4}q+\ldots +\binom 5 4 pq^4+q5$ $\binom 5 1 =\dfrac {5!}{1!\left( 5-1\right) !}=5$ then second term will be $\Rightarrow 5p^{4}q$
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