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Can you check my proof, (binomial theorem appplied)

  1. Oct 30, 2006 #1
    Hello everyone. The problem I'm wondering if I did correctly is #20. I also scanned #19 becuase thats a problem the book did which I know is correct.

    Here is my work:

  2. jcsd
  3. Oct 30, 2006 #2
    Looks good.
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