I'm running through some homework and have got the question

find the gradient of the following curve at the given point

f(x) = 1 / x^2 @ (2, 0.25)

so I looked at 1 / x^2

and I'm thinking

if x^-1 = 1 / x

will 1/x^2 = x^-2? Or -x^2 ?

Or am I just going off on one?

Thankyou for any help you can provide