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Limit x -> infinity

  1. Mar 9, 2009 #1
    I need to find the limit x -> infinity of the following:

    y = x ( (2x/a) / (1 + (2x/a)) )

    Simplifying..

    y = x ( (2x/a) / ((a + 2x)/a) )

    y = x ( 2x / (a + 2x) )

    y = 2x^2 / (a + 2x)

    Is this even right in the first place? because I have no idea how to evaluate the lim x -> infinity.
     
  2. jcsd
  3. Mar 9, 2009 #2

    HallsofIvy

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    If you were to divide the numerator by the denominator what would you get?
     
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