I'm trying to find out the concavity of I know the derivative is $\displaystyle (2/3)x^-(2/3)$ but I do not know how to solve for X Thanks
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Originally Posted by Chrisss I'm trying to find out the concavity of I know the derivative is $\displaystyle (2/3)x^-(2/3)$ but I do not know how to solve for X Thanks Solve WHAT for x?? You need the second derivative and check where it is positive and where negative. That'll give you the concavity of the function. Tonio
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