Results 1 to 6 of 6

Math Help - I want check my answer

  1. #1
    Senior Member
    Joined
    Oct 2009
    Posts
    290

    I want check my answer

    Hi
    I want check my answer
    Question 1
    I want check my answer-111.jpg
    Question 2
    I want check my answer-2222.jpg
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,110
    Thanks
    2
    x^{log(x)}\;=\;100 \cdot x

    You started out nicely

    log(x) \cdot log(x)\;=\;log(100 \cdot x)

    Then you rather wandered off.

    [log(x)]^{2}\;=\;log(x) + log(100)

    This is tantalizingly familiar.

    [log(x)]^{2}\;-\;log(x)\;-\;2\;=\;0

    It's Algebra I from here. Don't forget the ORIGINAL Domain.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Oct 2009
    Posts
    290
    I want exaplin to first step :

    log(x) \cdot log(x)\;=\;log(100 \cdot x)

    and last step

    why you say - 2 why you don't say - 100
    [log(x)]^{2}\;-\;log(x)\;-\;2\;=\;0
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member Bacterius's Avatar
    Joined
    Nov 2009
    From
    Wellington
    Posts
    927
    Because log_{10}(100) = 2, I guess.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor
    Joined
    Aug 2007
    From
    USA
    Posts
    3,110
    Thanks
    2
    It appeared to be a more interesting problem if these were logs base 10, so I assumed that they were and just threw that step in without discussion to see if you were paying attention. You were! Good work.

    log(100x) = log(100) + log(x)

    After that, why would I say just "100"? We're stuck with the logarithm function until it is treated properly.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Senior Member
    Joined
    Oct 2009
    Posts
    290
    thanx a lot
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Can someone check my answer please?
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: January 25th 2010, 05:49 AM
  2. Please Check my Answer TIA
    Posted in the Pre-Calculus Forum
    Replies: 7
    Last Post: June 19th 2009, 08:15 PM
  3. Please check this answer
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: December 15th 2008, 09:19 PM
  4. check my answer
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: August 16th 2008, 10:54 AM
  5. z=, check answer please. last one
    Posted in the Statistics Forum
    Replies: 2
    Last Post: August 10th 2006, 08:04 PM

Search Tags


/mathhelpforum @mathhelpforum