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11th Class Mathematics Sample Paper Maths Olympiad Model Paper-7

  • question_answer
    In the binomial expansion of \[{{(a-b)}^{n}},\] \[n\ge \,5,\] the sum of the \[{{5}^{th}}\,\,and\,\,{{6}^{th}}\] terms is zero. Then a/b equals

    A)  \[\frac{(n-5)}{6}\]                     

    B)  \[\frac{(n-4)}{5}\]

    C)  \[\frac{5}{(n-4)}\]                     

    D)  \[6\,(n-5)\]

    E)  None of these

    Correct Answer: B

    Solution :

     Not Available


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