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Math Help - Help Please!!!

  1. #1
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    Help Please!!!

    Can someone please help me solve this question?

    Find the least value of v+6400/v in the domain v>0.

    I have no idea....
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  2. #2
    MHF Contributor

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    Quote Originally Posted by Emililypad View Post
    Can someone please help me solve this question?

    Find the least value of v+6400/v in the domain v>0.

    I have no idea....
    Whoever gave you this problem clearly expects you to know that a maximum or minimum for a differentiable function occurs where the derivative is 0. If f(v)= v+ (6400/v), then f'(v)= 1- (6400/v^2). Set that equal to 0, solve for v, and find f(v) for that vaue of v.
    Last edited by mr fantastic; June 7th 2009 at 05:59 PM. Reason: Fixed latex
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