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Math Help - Product Rule - Marginal Revenue (Fill in the Blanks)

  1. #1
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    Question Product Rule - Marginal Revenue (Fill in the Blanks)

    Hi there everybody,

    I wonder if anyone could help me solving the following problem:



    I would really appreciate if you could give step by step solutions too. Thank you very much, everyone.
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  2. #2
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    Quote Originally Posted by wdma View Post

    let x be the number of additional people

    R(x) = (30+x)(120-2x)

    take the derivative to find R'(x)
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  3. #3
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    Hey Skeeter, actually I wanted some help taking the derivative to find R'(x).
    I got the first part (wanted to confirm), but it's in taking the derivative that I've been stuck with.

    Thank you very much for your help
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  4. #4
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    Quote Originally Posted by wdma View Post
    Hey Skeeter, actually I wanted some help taking the derivative to find R'(x).
    I got the first part (wanted to confirm), but it's in taking the derivative that I've been stuck with.

    Thank you very much for your help
    there are two ways to go ...

    1. use the product rule

    or

    2. expand the product and use the power rule
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