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## Homework Statement

Find the derivative of g(x)=R(sqrt(u(x)). Both R and u are differentiable functions.

## Homework Equations

N/A

## The Attempt at a Solution

I have been told that the solution is R' (sqrt(u(x)) * (1/2)u^(-1/2) * u' but I have no idea why. Please explain how to get to this solution.

Thanks.