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: Differentiation homework

  1. Jul 20, 2010 #1
    1. The problem statement, all variables and given/known data

    If y = x³ + 2x
    dx/dt = 5,
    dy/dt when x = 2.

    3. The attempt at a solution

    I'm not really sure how to solve this problem at all. It's the first I've seen like this so I don't know what approach I should take.
  2. jcsd
  3. Jul 20, 2010 #2


    User Avatar
    Homework Helper

    Re: Differentiation

    Use the chain rule in the form:
  4. Jul 20, 2010 #3
    Re: Differentiation

    Thank you so much!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook