we have given that [tex] \frac{1}{x^2} [/tex].
we need to express this interms of power of x .
we know that [tex] \frac{1}{x^n} =x^-n [/tex].
in place of n we have 2 .so [tex] \frac{1}{x^2} =x^-2 [/tex].
so this will be the expression interms of power of x .