Results 1 to 4 of 4

Math Help - Question on Logs

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    4

    Question on Logs

    When I try and solve the following I get the answer as log (x^-7/12)

    1/3log(x^2) + log x - 3/4 log (x^3)

    In the book it says log (x^1/12)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by davyboy123 View Post
    When I try and solve the following I get the answer as log (x^-7/12)

    1/3log(x^2) + log x - 3/4 log (x^3)

    In the book it says log (x^1/12)
    Note that, by the property n \log X = \log X^n, you have \log x^{2/3} + \log x + \log x^{-9/4}. Now use the property \log X + \log Y = \log XY
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,881
    Thanks
    668
    Quote Originally Posted by davyboy123 View Post
    When I try and solve the following I get the answer as log (x^-7/12)

    1/3log(x^2) + log x - 3/4 log (x^3)

    In the book it says log (x^1/12)
    I agree with you ...

    \frac{1}{3}\log(x^2) + \log{x} - \frac{3}{4}\log(x^3)

    \log(x^{\frac{2}{3}}) + \log{x} - \log(x^{\frac{9}{4}})

    \log\left(\frac{x^{\frac{2}{3}} \cdot x}{x^{\frac{9}{4}}}\right)

    \log\left(\frac{x^{\frac{5}{3}}}{x^{\frac{9}{4}}}\  right)

    \log\left(\frac{x^{\frac{20}{12}}}{x^{\frac{27}{12  }}}\right)

    \log\left(x^{-\frac{7}{12}}\right)<br />

    ... books have been wrong before.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member mrmohamed's Avatar
    Joined
    Dec 2009
    From
    Egypt
    Posts
    43

    Lightbulb

    Quote Originally Posted by davyboy123 View Post
    When I try and solve the following I get the answer as log (x^-7/12)
    Quote Originally Posted by davyboy123 View Post
    1/3log(x^2) + log x - 3/4 log (x^3)
    In the book it says log (x^1/12)


    Hi all
    another methode


    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. question regarding logs
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 1st 2009, 06:28 AM
  2. logs question
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: June 5th 2009, 03:13 PM
  3. Question about logs
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 5th 2009, 08:04 AM
  4. One question on logs.
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: May 31st 2009, 11:31 AM
  5. one more question on logs
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: May 28th 2009, 09:27 PM

Search Tags


/mathhelpforum @mathhelpforum