Asked by Jill

Suppose h(x)=1/\sqrt x for x>0. Does h have an inverse? If so, find h^-1(4).
Answered by Steve
h = 1/√x
h^2 = 1/x
x = 1/h^2
so, h^-1(x) = 1/x^2

h^-1(4) = 1/16
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