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Math Help - implicit differentiation (double check my answer plz)

  1. #1
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    implicit differentiation (double check my answer plz)

    0 = x^7 + y^7 - 7axy

    dy/dx = ( 7x^6 - 7y ) / (7x - 7y^6)

    dy/dx = ( x^6 - y ) / (x - y^6) ( i entered this as my answer and i got it wrong :S)
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  2. #2
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    Quote Originally Posted by rock candy View Post
    0 = x^7 + y^7 - 7axy

    dy/dx = ( 7x^6 - 7y ) / (7x - 7y^6)

    dy/dx = ( x^6 - y ) / (x - y^6) ( i entered this as my answer and i got it wrong :S)

    x^7 + y^7 - 7axy = 0

    7x^6 + 7y^6 dy/dx - 7ay -7axdy/dx = 0

    7x^6 - 7ay =7axdy/dx - 7y^6 dy/dx

    7x^6 - 7ay =(7ax - 7y^6) dy/dx

    dy/dx=(x^6 - ay) /(ax - y^6)
    `````````````````````````````````````````````

    Oh My Dear! you forgot "a" :P
    take care next time
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