1. Not finding help here? Sign up for a free 30min 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!

Basic derivative question

  1. Feb 13, 2008 #1
    I came across a derivative question on my exam that involved finding the derivative of


    and I realized I wasn't sure what to do with it... I figured you could either use

    [tex] f'(x^{n}) = nx^{n-1} [/tex]

    and come out with

    [tex] xe^{x} [/tex]

    or maybe since x is a variable you need to use the multiplication rule?

    f'g + g'f

    [tex]= e^{x} + xe^{x}[/tex]

    (Or maybe something entirely different - this is still new to me :uhh:)
  2. jcsd
  3. Feb 13, 2008 #2


    User Avatar

    You answered your own question. You use the product rule and come out with xe^x+e^x. Good job.

    EDIT: Some teachers would prefer you to simplify your problem into (x+1)e^x, but either way, you got the right answer.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Basic derivative question
  1. Basic Derivative? (Replies: 6)

  2. Basic Derivative (Replies: 6)

  3. Basic Derivative (Replies: 13)