Hi, Could someone give me somw much needed guidance on the following question:

Differentiate: f(x) = 2cos(3x - 1)/3x ?

I'm struggling to start with this one.

Firstly does 2cos(3x - 1)/3x become: 2/3 xcos(1 - 3x), I'm trying to remove the division by 3x?

Can someone please give me some help so I can get on with this?

Thanks in advance.