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    thinay's Avatar
    thinay Posts: 40, Reputation: 2
    Junior Member

    Aug 13, 2009, 09:56 AM

    Sure! No problem with me.. :)
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member

    Aug 13, 2009, 09:58 AM

    Thank you! :) :D :cool:
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member

    Aug 13, 2009, 04:07 PM
    my ans:
    This one we can do with implicit differentiation.

    Chain rule:

    Derivative of

    Derivative, implicitly, of x+y is 1+y'.

    You just didn't simplify further and solve for y'.

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