Results 1 to 6 of 6

Math Help - Camn I get my answer checked out?

  1. #1
    Member
    Joined
    Sep 2007
    From
    Colorado
    Posts
    145

    Camn I get my answer checked out?

    I need to take the derivative of  Y=(1+ln7x)^3

    I get 3(1+ln7x)^2 ( 1+\frac{7}{x})

    Is this correct?


    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member Failure's Avatar
    Joined
    Jul 2009
    From
    Zürich
    Posts
    555
    Quote Originally Posted by Darkhrse99 View Post
    I need to take the derivative of  Y=(1+ln7x)^3

    I get 3(1+ln7x)^2 ({\color{red}1+\frac{7}{x}})

    Is this correct?
    Almost, but not quite, because the derivative of 1+\ln(7x) happens to be 0+\frac{1}{7x}\cdot 7=\frac{1}{x}, and not what you thought it is.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jan 2009
    Posts
    236
    check the attachment ..
    Attached Thumbnails Attached Thumbnails Camn I get my answer checked out?-derivative.jpg  
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Sep 2007
    From
    Colorado
    Posts
    145
    So it's \frac{3}{x}(1+ln7x)^2?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member Failure's Avatar
    Joined
    Jul 2009
    From
    Zürich
    Posts
    555
    Quote Originally Posted by Darkhrse99 View Post
    So it's \frac{3}{x}(1+ln7x)^2?
    right
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Member
    Joined
    Jan 2009
    Posts
    236
    Correct ..
    but write ln(7x) with brackets ..
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 8
    Last Post: August 5th 2009, 01:34 PM
  2. Replies: 2
    Last Post: August 5th 2009, 12:32 PM
  3. Replies: 3
    Last Post: August 5th 2009, 12:14 PM
  4. I need this answer checked
    Posted in the Algebra Forum
    Replies: 5
    Last Post: July 27th 2008, 04:01 PM
  5. Need answer checked
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 9th 2008, 07:44 AM

Search Tags


/mathhelpforum @mathhelpforum