1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: How do you differenciate Log2(1-2x)

  1. Nov 8, 2008 #1
    1. The problem statement, all variables and given/known data
    So its log(base2)(1-2x)

    2. Relevant equations

    3. 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.
  2. jcsd
  3. Nov 8, 2008 #2


    Staff: Mentor

    Your answer looks fine to me, although it could also be written it as 2/[(2x - 1) ln 2]
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook