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Thread: I'm going to need some assistance with this one..

  1. #1
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    I'm going to need some assistance with this one..

    I don't even know where to start with this question.

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  2. #2
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    Use implicit differentiation with respect to t on your starting equation, then plug in the given values. You weren't given a value for z, so your solution for dz/dt will still have a z in it.

  3. #3
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    Quote Originally Posted by wjm11 View Post
    Use implicit differentiation with respect to t on your starting equation, then plug in the given values. You weren't given a value for z, so your solution for dz/dt will still have a z in it.
    Did I do this right?
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  4. #4
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    Quote Originally Posted by kitkalin View Post
    Did I do this right?
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    Almost right; error on the left hand side: d(z^2)/dt = 2z(dz/dt)

    Final solution: dz/dt = 0/2z = 0 (where z does not equal zero; note: it's already given that z is positive.))

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