Question

Let the value of $x$ satisfying $1/{\log }_{2}x=2$ be $k$. Find $k^2$ ?

Answer 1

$\frac{1}{{\log }_{2}x}$ is meaningful when $x>0$ and $x\ne 1$
and $\frac{2}{{\log }_{2}x}=1\Rightarrow x=4$
Ans: 4