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Homework Help: Limits 2

  1. Jan 18, 2009 #1
    1. The problem statement, all variables and given/known data
    limit of (3x^3+2)/ sqrt(x^4-2) as x approaches to minus infinity


    2. Relevant equations



    3. The attempt at a solution
    I tried to solve and I came up with limit of (3x^3+2)/ sqrt(x^4-2) as x approaches to minus infinity is plus infinity but when I checked the answer key, it is minus infinity can someone please tell me?
     
  2. jcsd
  3. Jan 18, 2009 #2

    tiny-tim

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    Hi chemic_23! :smile:
    Easy-peasy :tongue2: …

    for large negative x, the top is always negative, while the bottom is always positive …

    so the limit has to be negative. :smile:
     
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