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!

Log subtraction help

  1. Sep 8, 2011 #1
    1. The problem statement, all variables and given/known data

    log6(x+6) - log6(x-4) = 3

    2. The attempt at a solution

    150/36 is what i get which i simplified to 25/6.
    but the program tells me im wrong can anyone think of how im getting this wrong
  2. jcsd
  3. Sep 8, 2011 #2
  4. Sep 8, 2011 #3


    User Avatar
    Gold Member

    I get something close, what steps did you do to get at that answer?
  5. Sep 8, 2011 #4


    User Avatar
    Homework Helper
    Education Advisor
    Gold Member

    The logarithms (of the same base) are exponents so you can do:

    log6(x+6) - log6(x-4) = 3

    [tex] log_6 \frac{x+6}{x-4}=3[/tex]

    [tex] 6^3 = \frac{x+6}{x-4}[/tex]

    If you made that far, then you should find the rest of the steps.
  6. Sep 8, 2011 #5
    i figured it out now. i was squaring the base instead of cubing it. thanks for your help tho !!
  7. Sep 8, 2011 #6


    User Avatar
    Gold Member

    So what did you get?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Log subtraction help
  1. Help with a log (Replies: 6)

  2. Help with logs! (Replies: 2)

  3. Numerator log help (Replies: 7)

  4. Logs math help (Replies: 2)

  5. Log equations help! (Replies: 10)