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: Quick derivitive ?

  1. Feb 24, 2008 #1
    y = ln|2-x-5x^2|

    when you take the derivitve of somthing like this you can ignore the abs value signs right?

    for the ans i got -1-10x / 2-x-5x^2
    the answer is 1+10x / -2+x+5x^2

    i obviously made some mistake some where because i have the same number just with different signs
  2. jcsd
  3. Feb 24, 2008 #2
    The two answers are the same. If the first answer is given by [itex]-a/b[/tex], the second one would be [itex]a/-b[/itex]. The negative is just in a different place.
  4. Feb 24, 2008 #3
    thanks i didt see that
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook