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Homework Help: How do you differentiate this?

  1. Aug 6, 2009 #1
    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Aug 6, 2009 #2
    I applied the Product Rule and got this :

    7.Sqrt[x] + (7x - 8)/(2.Sqrt[x])
     
  4. Aug 6, 2009 #3
    7(x^3/2) - 8(x^1/2) is just from multiplying out the bracket, you haven't actually differentiated it yet. See if you get the right answer when differentiating what you already have :)
     
  5. Aug 6, 2009 #4
    omg you're right...I feel so stupid. >< I shouldn't have taken calc over the summer! lol
     
  6. Aug 6, 2009 #5
    Don't worry, I have moments like that far too often. Good luck!
     
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