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Question about Binomial expansion.

  1. Jan 1, 2005 #1
    I have my question and my problem in the attachment that followed.

    Attached Files:

  2. jcsd
  3. Jan 1, 2005 #2


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    Looks like you've already done the tough part. Hint: You want to choose m, n and p so that p is really small compared to m and n. Also, you want the result to be a fraction, so you want [tex]\sqrt {\frac{m}{n}}[/tex] to come out to a fraction or integer. See if you can choose m, n and p now.
  4. Jan 1, 2005 #3


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    You will say "doh!" :wink:

    [tex]\sqrt{\frac{101}{401}} = \sqrt{\frac{100+1}{400+1}}[/itex]

    Use your formula with m=100, n=400 and p=1 and the fact that [itex]\sqrt{0.25}=0.5[/itex]!
  5. Jan 1, 2005 #4
    Thanks for your help.I think I now can understand what the question want.
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