Results 1 to 11 of 11

Thread: Derivative

  1. #1
    Junior Member
    Joined
    Aug 2008
    Posts
    72

    Derivative

    Is this right for the derivative of arcsin(2x)?

    = 1/√(1 - 4x)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    14,796
    Thanks
    3013
    Quote Originally Posted by offahengaway and chips View Post
    Is this right for the derivative of arcsin(2x)?

    = 1/√(1 - 4x)
    missing a "2" in the numerator (derivative of 2x)
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Aug 2008
    Posts
    72
    thanks
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Aug 2008
    Posts
    72

    Another differentiation problem

    is the differential of √(1 - 4x)

    =1/2(1 - 4x)^-1/2
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Jun 2009
    From
    Africa
    Posts
    641

    Smile

    hello
    you've forgotten the differential of 1-4x^{2}
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Junior Member
    Joined
    Aug 2008
    Posts
    72
    Which is -8x?
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Junior Member
    Joined
    Aug 2008
    Posts
    72
    While im here can this be simplified?

    arcsin(2x)1/2(-8x)^-1/2
    Follow Math Help Forum on Facebook and Google+

  8. #8
    Super Member
    Joined
    Jun 2009
    From
    Africa
    Posts
    641
    hello
    you mean this : \frac{asin\left( 2\,x\right) }{4\,\sqrt{2}\,\sqrt{-x}} ?
    Follow Math Help Forum on Facebook and Google+

  9. #9
    Junior Member
    Joined
    Aug 2008
    Posts
    72


    i mean this

    arcsin(2x)[1/2(-8x)^-1/2]

    can the above be simplified?
    Follow Math Help Forum on Facebook and Google+

  10. #10
    Super Member
    Joined
    Jun 2009
    From
    Africa
    Posts
    641

    Smile

    try to expand what is in [ ],you'll have the same result,and it's already simplified.
    (or probably i went wrong)
    Follow Math Help Forum on Facebook and Google+

  11. #11
    Junior Member
    Joined
    Aug 2008
    Posts
    72
    thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. contuous weak derivative $\Rightarrow$ classic derivative ?
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: Apr 22nd 2011, 02:37 AM
  2. Replies: 0
    Last Post: Jan 24th 2011, 11:40 AM
  3. [SOLVED] Definition of Derivative/Alt. form of the derivative
    Posted in the Calculus Forum
    Replies: 2
    Last Post: Sep 23rd 2010, 06:33 AM
  4. Derivative Increasing ==> Derivative Continuous
    Posted in the Differential Geometry Forum
    Replies: 2
    Last Post: Feb 23rd 2010, 10:58 AM
  5. Replies: 2
    Last Post: Nov 6th 2009, 02:51 PM

Search Tags


/mathhelpforum @mathhelpforum