1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Homework Helper

    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


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Question about Binomial expansion.
  1. Binomial expansion (Replies: 1)

  2. Binomial expansion (Replies: 7)