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in Mathematics by (71.2k points)

The sum of coefficient of middle terms in expansion of (1+x)2n-1 is_______

(a) (2n-1) Cn 

(b) (2n-1) C(n-1) 

(c) 2n Cn 

(d) 2n C(n+1)

1 Answer

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Best answer

Correct option: (c) 2n Cn

Explanation:

Here nth and (n+1) th terms are middle terms and sum of coefficients

(2n-1) C(n-1) + (2n-1) Cn = 2n Cn

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