1. ## Chain Rule Question

I have to find the derivative of $x(x^2+1)$^(1/2)
The problem is, I thought the chain rule was deriv. of outside (leave inside alone) multiplied by the deriv. of the inside.

1/2 $x(x^2+1)$^(-1/2) $* (2x)$

yet when I test it in my calculator, it is wrong, what am I missing?

2. Originally Posted by BCHurricane89
I have to find the derivative of $x(x^2+1)$^(1/2)
The problem is, I thought the chain rule was deriv. of outside (leave inside alone) multiplied by the deriv. of the inside.
1/2 $x(x^2+1)$^(-1/2) $* (2x)$
what about the x that you have in front of the $(x^2 + 1)^{1/2}$?? you have a product of functions, you must use the product rule