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Homework Help: Difference Quotient problem on test

  1. Jan 7, 2010 #1
    I took a placement test and blew it away. (I tested into calculus, best possible placement for this test.) Everything was rather simple except for this problem which I cannot seem to get right. Can someone show me where I'm going wrong here?

    1. The problem statement, all variables and given/known data
    Use x2+2 in the Difference Quotient.

    2. Relevant equations

    3. The attempt at a solution






    This answer was not a given choice. Any ideas where I'm messing up?
    (I'm sure I making stupid mistake somewhere that I'm overlooking)
  2. jcsd
  3. Jan 7, 2010 #2
    There is an error in this line.
  4. Jan 7, 2010 #3


    Staff: Mentor

    More specifically, you expanded (x + h)2 incorrectly. Also, you should use = between an expression on one line and the one on the following line.
  5. Jan 7, 2010 #4
    ahh! okay....










    That is the answer I chose since it was closest to my answer. You guys rock, thanks!
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