Chapter 11.3, Problem 12PPS

To determine

To State: The excluded values for rational expression.

Answer to Problem 12PPS

  $\pm 7$

Explanation of Solution

Given: $\frac{-n}{n^2-49}$

Given: $\frac{-n}{n^2-49}$

Exclude the values for which $n^2-49=0$

The denominator cannot be zero.

  $n^2-49=0$

Factoring

  $\begin{array}{l}(n-7)(n+7)=0\\ n=\pm 7\end{array}$

Thus

The excluded values are $\pm 7$