1.

Sum of coefficients of x^(2r) , r = 1,2,3…. in (1+x)^n is

Answer»

`(2N^(N-1)-1)`
`(2^(n-1) +1)`
`(2^(n-2) + 1)`
`(2n^(n - 2) -1) `

ANSWER :A


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