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Binomial Theorem Problem

  1. Jul 17, 2013 #1
    1.Find n, if the term 11 coefficient it is 6 time the term 10 coefficient in



    2.(6x^7 + 5x^(-4))^n



    3
     

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  2. jcsd
  3. Jul 17, 2013 #2

    mfb

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    I am not sure what term 11 and 10 are (counted from what?), but you should not have all those powers of x in your calculation. The coefficient is the value in front of xwhatever.
     
  4. Jul 17, 2013 #3

    haruspex

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    81 looks right to me.
     
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