Results 1 to 3 of 3

Math Help - Difficult logarithm question - please help?

  1. #1
    Newbie
    Joined
    Apr 2013
    From
    Canada
    Posts
    1

    Difficult logarithm question - please help?

    If log[a]x=5 and log[a]y=8, solve:

    log[a]((ax^2)/(√y))^-2

    ---------

    I am completely lost. Can someone please give me a step-by-step solution? Please and thank you!
    Attached Thumbnails Attached Thumbnails Difficult logarithm question - please help?-log.png   Difficult logarithm question - please help?-log.png  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,969
    Thanks
    1788
    Awards
    1

    Re: Difficult logarithm question - please help?

    {\log _a}\left[ {{{\left( {\frac{{a{x^2}}}{{\sqrt y }}} \right)}^{ - 2}}} \right] =  - 2\left[ {{{\log }_a}(a) + 2{{\log }_a}(x) - \frac{1}{2}{{\log }_a}(y)} \right]
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Jul 2012
    From
    INDIA
    Posts
    834
    Thanks
    209

    Re: Difficult logarithm question - please help?

    The method given by Plato is good. I was just trying something different. OK
    Attached Thumbnails Attached Thumbnails Difficult logarithm question - please help?-05-apr-2.png  
    Last edited by ibdutt; April 4th 2013 at 10:26 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Difficult logarithm question
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: April 29th 2010, 09:48 AM
  2. quite a difficult question
    Posted in the Advanced Math Topics Forum
    Replies: 4
    Last Post: December 14th 2009, 10:43 PM
  3. Difficult Question!
    Posted in the Statistics Forum
    Replies: 2
    Last Post: April 10th 2008, 06:11 AM
  4. Difficult A2 logarithm
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 30th 2006, 05:41 AM
  5. Difficult simplification for logarithm
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 28th 2006, 05:36 PM

Search Tags


/mathhelpforum @mathhelpforum