## Algebra: A Combined Approach (4th Edition)

$\frac{1}{2}$ and $\frac{2}{1}$ are reciprocals because they are the opposite of each other. There cannot be another reciprocal of either because there is only one possible opposite of something
Find two real numbers that are their own reciprocal. Explain why there are only two. Reciprocals are the flipped equations of the given. The reciprocal of $\frac{10}{2}$ is $\frac{2}{10}$