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11th Class Mathematics Sample Paper Maths Olympiad Model Paper-4

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

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

    B)  \[\frac{n-4}{6}\]

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

    D)  \[\frac{n-4}{5}\]

    E)  None of these

    Correct Answer: D

    Solution :

     Not Available


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