Here's the question you clicked on:
monroe17
find (f^-1)'(a) f(x)=sqrt(x^3+x^2+x+1) a=2
the inverse of sqrt(x^3+y^2+x+1)
i believe you're t(rying to find derivative of that equation then *2? so (x^3 + x^2 + 1)^1/2 1/2(x^3+x^2+1)^-1/2 * (3x+2x) via chain rule rest just simply and afterwards multiple by a=2 to complete answer