Competition problem — Algebra — Maths Olympiad Prep

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Algebra Difficulty 1.9 Junior Find the answer

let $n=x-y^{x-y}$ . Find $n$ when $x=2$ and $y=-2$ :

Pick one

Solution

Substitute the variables to determine the value of $n$ .
$n = 2 - (-2)^{2-(-2)}$
$n = 2 - (-2)^4$
$n = 2 - 16$
$n = -14$
The answer is $\boxed{\textbf{(A)}}$ .

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