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+1 vote
3.2k views
in Binomial theorem by (46.6k points)

If n is even, then in the expansion of (1 + x2/2! + x4/4! + ...)2, the coefficient of xn is

(a)  2n/n!

(b)  2n - 2/n!

(c)  2n - 1 - 1/n!

(d)  2n - 1/n!

1 Answer

+1 vote
by (52.7k points)
selected by
 
Best answer

Correct option (d)  2n - 1/n!

Therefore, the coefficient of xn(n even) 

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