A. ±4

B. ±2

C. ±3

D. ±8

If T_{r+1} is the term independent of x in (3x-5/x^{3})^{8} then r=

The 4^{th} term of (1-2x)^{-1} when x=1/3 is

If x^{r} occurs in the expansion (x+1/x^{2})^{2n}, then its coefficient is:

The sum of the coefficients of (1+2x-4x^{2})^{35} is

The number of non zero terms in the expansion of (x+a)^{100} + (x-a)^{100} is