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Homework Help: Limit involving floor function

  1. Oct 17, 2012 #1
    1. The problem statement, all variables and given/known data
    Evaluate lim x-->infinity [x]/x and lim--> -infinity [x]/x.

    2. Relevant equations

    3. The attempt at a solution

    The think the limits for both of these are 1. I also know that [x] is the largest integer not greater than x.

    I think that I can use the squeeze theorm to say that x-1/x <[x]/x <equal to 1. Does this arguement work for both limits or should I prove this an alternate way?
  2. jcsd
  3. Oct 17, 2012 #2


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    Homework Helper

    For one thing you should use parentheses if you don't want to use TeX. x-1/x is not the same as (x-1)/x and I think you meant (x-1)/x. For another show us how you got that inequality for x>0. And finally you should be able to figure out if it works for x<0. Try x=(-1/2). What went wrong??
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