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If the coefficient of the 5th, 6th and 7th terms of the expansion of (1+x)^n are in A.P then the value of n may be _______

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If the coefficient of the 5th, 6th and 7th terms of the expansion of (1+x)n are in A.P then the value of n may be _______

(a) 5 

(b) 6 

(c) 7 

(d) 8

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1 Answer

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Best answer

Correct option: (c) 7

Explanation:

by solving, We get n = 7 or 14.

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