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Unbounded Sequence

  1. Aug 21, 2012 #1
    1. The problem statement, all variables and given/known data
    Is the sequence xn=[(n5+7n+3)7]/[(7-n4)6] bounded?


    3. The attempt at a solution

    I've managed to tell that the sequence is not bound because as n tends to ∞ xn also tends to ∞ but it took me a relatively long time.
    Is there any way of telling this by just looking at the exponents or what is the quickiest way to tell that this sequence will get infinitely large.
  2. jcsd
  3. Aug 21, 2012 #2


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    The highest degree of n in the numerator is 35 and in the denominator is 24. That's all you need to know.
  4. Aug 21, 2012 #3
    I was pretty sure it was something simple. Thanks!
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