The number of terms in the expansion of `(x+1/x+1)^n` is (A) 2n (B) `2n+1` (C) `2n-1` (D) none of these

The number of terms in the expansion of (x^2+1+1/x^2)^n, n in N , is:

The middle term in the expansion of (x + 1/x)^(2n) is

The middle terms in the expansion of (1+x)^(2n+1) is (are)

Find the number of terms in the expansion of (1-2x+x^(2))^(n) .

Statement-1 The number of terms in the expansion of (x + (1)/(x) + 1)^(n) " is " (2n +1) Statement-2 The number of terms in the expansion of (x_(1) + x_(2) + x_(3) + …+ x_(m))^(n) "is " ^(n + m -1)C_(m-1) .

The middle term in the expansion of (1 - (1)/(x))^(n) (1 - x)^(n) is

Thenumber of distinct terms in the expansion of (x_1+x_2+……..+x_p)^n is (A) .^(n+p)C_n (B) .^n C_1 (C) n+1 (D) .^(n+p-1)C_(p-1)

If n is not a multiple of 3, then the coefficient of x^n in the expansion of log_e (1+x+x^2) is : (A) 1/n (B) 2/n (C) -1/n (D) -2/n

Find the (r+1) th term in the expansion of ((x)/(a)-(a)/(x))^(2n)

Find the (r+1) th term in the expansion of ((x)/(a)-(a)/(x))^(2n)