Posted by Ryan on August 30, 2002 at 09:05:02:
x=g(x) is the inverse of y=f(x)
does d2y/dx2 = 1/(d2x/dy2)?
sugg: g' is a function of x and x is a function of y
find the derivative of y'=1/x' with respect to x, and use the chain rule on the right side.
I make U=x' and du = x", so i get x"(-1/x'^2)
--> The answer is y"=-x"/(x'^3) --> but I am only getting y"=-x"/(x'^2)
What am I missing????
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