Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.5 - The Binomial Theorem - 11.5 Exercises - Page 813: 15

Answer

$\begin{pmatrix} 5 \\ 1 \end{pmatrix}=5$

Work Step by Step

Fifth row of Pascal's triangle: $1~~5~~10~~10~~5~~1$ It corresponds to: $\begin{pmatrix} 5 \\ 0 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 1 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 2 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 3 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 4 \end{pmatrix}$ $\begin{pmatrix} 5 \\ 5 \end{pmatrix}$ So, $\begin{pmatrix} 5 \\ 1 \end{pmatrix}=5$
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