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: Grade 12 Calculus, can someone pls, check for me?

  1. Dec 14, 2004 #1
    For both questions i have to find dy/dx
    1. y=x^5e^-3x

    I got (5x^4 e^-3x) + (x^5 (-3xe^-3x-1))

    some how that doesn't look right to me. not too sure...

    y= --------
    My answer was:

    (e^-x) - (1-e^-x) (2xe^2x-1)
    y'= -----------------------------

    Thanks for your help! It's much appreciated!
  2. jcsd
  3. Dec 14, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    1.It's wrong.It is an "x" too much.Figure out where. :wink:
    2.It's wrong.Again an "x" too much,a 'minus' missing,a whole term missing and a sqare on the denominator.Figure it out yourself.

  4. Dec 14, 2004 #3
    First of all, thanks for replying, i'm still working on fixing the 2nd question, but i think i got the first one, the answer should be:

    y' = (5x^4 e^-3x) + (x^5 -3e^-3x)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook