Intermediate Algebra (6th Edition)

-5, $\frac{1}{5}$
The opposite of a number a is equal to -a (which is just the negative of a). The reciprocal of a number a is equal to $\frac{1}{a}$. We are given that $a=5$. Opposite: $-a=-(5)=-5$ Reciprocal: $\frac{1}{a}=\frac{1}{5}$