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In the binomial expansion of (a - b)n, n ≥ 5 the sum of the 5th and 6th terms is zero.

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In the binomial expansion of (a - b)n, n ≥ 5 the sum of the 5th and 6th terms is zero. Then, a/b equals

(a) (n - 5)/6

(b) (n - 4)/5

(c) 5/(n - 4)

(d) 6/(n - 5)

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The correct option is (b) (n - 4)/5

Explanation:

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