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#8 b)

  1. Jul 6, 2014 #1

    Stb

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    1. The problem statement, all variables and given/known data

    Problem#8 b) is attached as a photo

    2. Relevant equations



    3. The attempt at a solution
    B) n^2-n=90. C)nP5=14(nP4)
    N^2-n-90=0. N!/(n-5)=14(n!/n-4)
    (N-10)(n+9)=0
    N=10
    N=-9
     
    Last edited by a moderator: Jul 6, 2014
  2. jcsd
  3. Jul 6, 2014 #2

    LCKurtz

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    Rather than give us in image (upside down at that), please type the question here as per the forum rules.
     
  4. Jul 6, 2014 #3

    micromass

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    Yes, please do that in a new thread.
     
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