" Find the coefficient of "x" in the expansion of "[sqrt(1+x^(2))-x]^(-1)" in ascending power of "x" when "|x|<1" ."

Find the coefficient of x^9 in the expansion of (1/x + x^2)^18

The coefficient of x^(4) in the expansion of {sqrt(1+x^(2))-x}^(-1) in ascending powers of x when |x|<1, is 0 b.(1)/(2) c.-(1)/(2) d.-(1)/(8)

Find the coefficient of x^8 in the expansion of (x^2-1/x)^(10)

Find the coefficient of x^8 in the expansion of (x^2-1/x)^(10)

Find the coefficient of x^8 in the expansion of (x^2-1/x)^(10)

Find the coefficients of x^4 in the expansion of (1+x+x^2)^3

Find the coefficient of x-2 in the expansion of (x-(1)/(x))^(12)

The coefficient of x in the expansion of {sqrt(1+x^2)-x}^(-1) in ascending powers of x , when |x|<1,i s a. 1 b. 1/2 c. -1/2 d. -1/8

The coefficient of x^4 in the expansion of {sqrt(1+x^2)-x}^(-1) in ascending powers of x , when |x|<1,i s a. 0 b. 1/2 c. -1/2 d. -1/8