1. logarithmic differentiation

I'm having trouble with this because I don't know the power 3x is being raised to.

2. Originally Posted by abel2
I'm having trouble with this because I don't know the power 3x is being raised to.

$y=\left( (3x)^{\frac{1}{4}} \right)^x = (3x)^{\frac{x}{4}}$