How do you differenciate Log2(1-2x)

[BJducky]

Homework Statement

So its log(base2)(1-2x)

Homework Equations

The Attempt at a Solution

I understand that derivative of log(base:a)x equals 1/xlna. However, using (1-2x) for x and 2 for a I got 1/(1-2x)ln2. Of course, i have to use the chain rule, which turns out to be -2. So my final answer is -2/(1-2x)ln2. However, it seems like that is incorrect. please help me.

 

[Mark44]

Your answer looks fine to me, although it could also be written it as 2/[(2x - 1) ln 2]