Results 1 to 4 of 4

Math Help - finding power of

  1. #1
    Newbie
    Joined
    Aug 2010
    Posts
    2

    finding power of

    Hi,

    one simple question (to someone who knows), i am stuck,
    how to get n from equation, if i know what x and y are:

    x = y^n
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,653
    Thanks
    1478
    You need to use logarithms...

    x = y^n

    \ln{x} = \ln{(y^n)}

    \ln{x} = n\ln{y}

    n = \frac{\ln{x}}{\ln{y}}.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Aug 2010
    Posts
    2
    TNX , i thought it has something to do with logarithms. I really appreciate it
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,653
    Thanks
    1478
    Of course, it doesn't have to be the natural logarithm. It can be the logarithm of any base... I just always use natural logarithms because they're the most often used in practice...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Finding a power series
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 21st 2011, 01:23 PM
  2. Finding the power equation?
    Posted in the Algebra Forum
    Replies: 9
    Last Post: October 20th 2011, 06:42 AM
  3. Finding a power series
    Posted in the Calculus Forum
    Replies: 3
    Last Post: March 6th 2010, 07:41 AM
  4. Help finding a power series
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 29th 2008, 04:26 PM
  5. Replies: 10
    Last Post: April 18th 2008, 10:35 PM

Search Tags


/mathhelpforum @mathhelpforum