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: The derivative of sin(x)/x^2e^x?

  1. Sep 30, 2012 #1
    I need to find the derivative of y=(sinx)/(x^2e^x)?

    I tried using the product rule on the denominator and then I assume I need to use the quotient rule. But I'm not sure if I use the quotient rule with the derivative I found for the denominator or? I'm confused :$
  2. jcsd
  3. Sep 30, 2012 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You have the idea. You start differentiating with the quotient rule. In the process of doing that, at the part where you have to differentiate the denominator, right there use the product rule to differentiate the denominator, then continue. So you use the product rule in the middle of doing the quotient rule.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook