# Thread: can anybody help me find the derivative of this f(x)

1. ## can anybody help me find the derivative of this f(x)

f(x) = sqrt ( x^2 + (4x/x - 8)^2 )

thanks a lot for you help

2. What have you tried yourself? If you let $u= x^2$, $v= \frac{4x}{x- 8}$, and $w= v^2$, that function is $f(x)= (u+ v)^{1/2}$
You will need to use the power rule, the quotient rule, and the chain rule.