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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
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