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Let a,b,c,d be the foru cosecutive coeff...

Let a,b,c,d be the foru cosecutive coefficients int eh binomial expansion `(1+x)^n` On the basis of above information answer the following question: The value of n is (A) `(2ac-b(a+c))/(b^2-ac)` (B) `(2ac+b(a+c))/(b^2-ac)` (C) `(2ac)/(a+c)-b` (D) `(b^2-ac)/(2ac+b(a+c)`

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