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Homework Help: Evaluate the following limits

  1. Mar 16, 2013 #1
    1. The problem statement, all variables and given/known data

    a. lim

    (x^3 − 2x + 7)/(3x^2 − 3)

    b. lim


    2. Relevant equations

    3. The attempt at a solution

    For a. I obtained a limit of 7/-3
    For b. the limit does not exist

    (I really unsure about this)
  2. jcsd
  3. Mar 16, 2013 #2


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    Homework Helper

    They both look good. Could you elaborate on part (b) a little more though?
  4. Mar 16, 2013 #3

    For b:

    lim 1/(x+1) = ∞ (+)
    x→-1 (+)

    lim 1/(x+1)= ∞ (-)
    x→-1 (-)

    Therefore, lim 1/(x+1)=undefined
  5. Mar 16, 2013 #4


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    Science Advisor
    Homework Helper

    That's just fine.
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