Question

If you move a power from the numerator to the denominator OR from the denominator to the numerator you must also change?

Answer 1

Solution.

Recall in laws of indices,

$\begin{gathered} \frac{1}{x^2}=x^{-2} \\ y^2=\frac{1}{y^{-2}} \end{gathered}$

Thus, If you move a power from the numerator to the denominator OR from the denominator to the numerator you must also change the sign attached to the power to its opposite (that is from + to - or from - to + as the case may be)