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!

Finding the derivative

  1. Nov 13, 2011 #1
    1. The problem statement, all variables and given/known data
    f(x)=(x2-x)(sin(x))


    2. Relevant equations
    Chain rule
    Product rule


    3. The attempt at a solution
    f'g(x)*g'(x)
    cosx

    (2x-x)(cosx)

    Would you use the product rule after using the power rule and chain rule?
     
  2. jcsd
  3. Nov 13, 2011 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Review the product rule !
     
  4. Nov 13, 2011 #3

    Mark44

    Staff: Mentor

    ???
    This looks like you're attempting to use the chain rule.
    No. Use the product rule first. You don't need the chain rule at all.
     
  5. Nov 13, 2011 #4
    (x2-x)cosx+sinx(2x-1)

    X2cosx-xcosx+2xsinx-sinx
     
  6. Nov 13, 2011 #5

    eumyang

    User Avatar
    Homework Helper

    That's more like it!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Finding the derivative
  1. Finding the Derivative (Replies: 11)

  2. Find derivative (Replies: 1)

  3. Find the derivative. (Replies: 4)

  4. Find the Derivative (Replies: 12)

  5. Finding derivatives (Replies: 3)

Loading...