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Problem involving derivative and left-hand limit

  1. Oct 10, 2013 #1
    This is from an online homework that's due in an hour. This question has been bothering me all day and I'm convinced that there's a problem with the website.

    It's asking for the expression that's used to find the left-hand limit of the derivative, f'(0).

    It won't take 2x+6 as the answer... Am I missing something or is the website just screwed up?

    I attached a picture of the problem. Help fast!
     

    Attached Files:

  2. jcsd
  3. Oct 10, 2013 #2
    Do you remember the derivative of of $$x^n$$?
     
  4. Oct 10, 2013 #3
    Wouldn't that be n?
     
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