# Chapter 2 - Functions - Review Exercises and Problems for Chapter Two - Page 109: 11

(a)$f(1)=2$, $f(-1)=0$, $-f(1)=-2$ (b) $x=-1$

#### Work Step by Step

(a) At $x=1$, $f(x)=2$. So, $f(1)=2$. At $x=-1$, $f(x)=0$. So, $f(-1)=0$. Since $f(1)=2$, $-f(1)=-2$. (b) $f(-1)=0$. Therefore, the solution must be $x=-1$.

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