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Math Help - Length of arc curve

  1. #1
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    Length of arc curve

    Find the length of arc of the curve 9y^2 = 4x^3 from the origin to the point

    THe answer should be 14/3

    Heres my solution:





    After that i got an answer of 3.85 w/c is not favorable of the answer key

    why am i not getting this right?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by ^_^Engineer_Adam^_^ View Post
    Find the length of arc of the curve 9y^2 = 4x^3 from the origin to the point

    THe answer should be 14/3

    Heres my solution:





    After that i got an answer of 3.85 w/c is not favorable of the answer key

    why am i not getting this right?
    The derivative you found is incorrect:
    Attached Thumbnails Attached Thumbnails Length of arc curve-arc.gif  
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  3. #3
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    Re: Length of arc curve

    Quote Originally Posted by Jhevon View Post
    The derivative you found is incorrect:
    How do I solve the problem if I will use the limit (0, 2 sqrt of 3)?
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  4. #4
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    Re: Length of arc curve

    Well, you've cited an eight year old thread to find arc length.

    Is $(0,2\sqrt{3})$ a set of coordinates or something else? Are you using the same curve as stated in the citation?

    It would help if you wrote out your problem statement in full detail.
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