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Homework Help: Question about series.

  1. Jan 23, 2008 #1
    1. The problem statement, all variables and given/known data

    I'm attached a pic of an example.

    just wondering when i was trying the ratio test with a problem, i noticed numbers displayed in the pic.

    is another way to write those examples like this: 5*5 or (x-1)*(x-1) ?

    is that all the n+1 means?

    also if there was something like: (n^7) / (n+1)^7 how can those cancel?
    sorry about notation there.

    thanks

    2. Relevant equations



    3. The attempt at a solution
     
    Last edited: Jan 24, 2008
  2. jcsd
  3. Jan 24, 2008 #2
    nevermind.
     
  4. Jan 24, 2008 #3
    [tex] \frac{n^7}{(n+1)^7} [/tex] behaves like [tex] \frac{n^7}{n^7} [/tex] for large n

    so in your example it's just 1 if the limit goes to infinity. Can you see it?
     
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