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Math Help - Second derivative with implicit differentiation help

  1. #1
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    Second derivative with implicit differentiation help

    Hey guys, I need help with a second derivative for xy+y3=5

    My final is d2y/dx2=2xy/(x+3y2)3

    Can yall check if this is right?
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  2. #2
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    Re: Second derivative with implicit differentiation help

    You are really close. the denominator (x+3y^2) is squared not cubed.
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  3. #3
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    Re: Second derivative with implicit differentiation help

    You are absolutely right. see the attachmentSecond derivative with implicit differentiation help-05-jun-13-1.png
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  4. #4
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    Re: Second derivative with implicit differentiation help

    I retract my statement. I made a mistake with squaring the denominator. you are correct.
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