Results 1 to 2 of 2

Math Help - solve the log equation

  1. #1
    Newbie
    Joined
    Nov 2006
    Posts
    18

    solve the log equation

    How do you solve this log equation? I tried using the quotient rule for logarithms, but am not getting anywhere.

    solve the log equation-logs.bmp
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    10,211
    Thanks
    419
    Awards
    1
    Quote Originally Posted by math619 View Post
    How do you solve this log equation? I tried using the quotient rule for logarithms, but am not getting anywhere.

    Click image for larger version. 

Name:	logs.bmp 
Views:	23 
Size:	8.3 KB 
ID:	1541
    log_2(5) = log_2(x + 32) - log_2(x)

    log_2(5) = log_2 \left ( \frac{x + 32}{x} \right )

    Now equate the arguments:
    5 = \frac{x + 32}{x}

    5x = x + 32

    4x = 32

    x = 8

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Solve Differential equation for the original equation
    Posted in the Differential Equations Forum
    Replies: 5
    Last Post: February 21st 2011, 02:24 PM
  2. need to solve summation equation to solve sum(x2)
    Posted in the Statistics Forum
    Replies: 2
    Last Post: July 16th 2010, 11:29 PM
  3. How to solve this equation
    Posted in the Algebra Forum
    Replies: 4
    Last Post: December 8th 2009, 06:45 AM
  4. solve this equation for x
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 26th 2009, 05:50 AM
  5. Replies: 13
    Last Post: May 19th 2008, 09:56 AM

Search Tags


/mathhelpforum @mathhelpforum