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Prove that the the DERIVATIVE of p(x) is ?

  1. Mar 20, 2013 #1
    Prove that the the DERIVATIVE of p(x) is....?

    1. The problem statement, all variables and given/known data

    If p(x) = (2x+8) / (√x) Prove that p'(x) is (x√x - 4√x)/x


    3. The attempt at a solution

    I keep getting stumped, I cannot simplify it down
     
  2. jcsd
  3. Mar 20, 2013 #2

    Dick

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    Well, what's your answer? Show your work. I think the given answer is wrong.
     
  4. Mar 20, 2013 #3
    Heres what I got: (2x+8)(-1/2) [x^(-3/2)] + {x^(-1/2)} (2) but from here I dont know where to go...
     
  5. Mar 21, 2013 #4

    SteamKing

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    You can try simplifying it algebraically. Remember, you are trying to match a given answer.
     
  6. Mar 21, 2013 #5
    What do you mean by simplifying it algebraically?? Can you give me a start?
     
  7. Mar 21, 2013 #6

    Dick

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    You want to write it as (something)/x. Multiply what you've got by x/x.
     
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