1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook