# How do you find the derivative of xln^(3x)?

ASSUMING you meant $x \ln \left(3 x\right)$:
Let $f \left(x\right) = x \ln \left(3 x\right)$
$f ' \left(x\right) = x \left(\frac{3}{3 x}\right) + \left(1\right) \ln \left(3 x\right)$
$f ' \left(x\right) = 1 + \ln \left(3 x\right)$