Question 9
First, find all ordered pairs of integers $(x,y)$ satisfying $x^y=16$. Next, find the sum of all possible values of $x$ and the sum of all possible values of $y$. Finally, find the positive difference between the two sums.
Clarification: add the coordinates over all ordered pairs, counting a repeated coordinate once for each pair in which it occurs.
Clarification: add the coordinates over all ordered pairs, counting a repeated coordinate once for each pair in which it occurs.