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Math Help - Applications of differentiation!

  1. #1
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    Applications of differentiation!

    Solved!
    Attached Thumbnails Attached Thumbnails Applications of differentiation!-untitled.jpg  
    Last edited by Shiraz; June 18th 2010 at 06:36 AM.
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  2. #2
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    (1) 900a + 30b + c = 30

    In the above equation substitute a = -1/90 and c = 0, and find the value of b.
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  3. #3
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    Everything looks good up until the moment you introduce the derivative (which you take correctly - it's how you use it I'm not so sure of). Why not continue solving for b in the usual way? You've found c and a. Any original equation should give you b. I think you need to plug in different values into the derivative.
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  4. #4
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    Thanks guys. Understand completely now.
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