A. 20
B. 120
C. 336
D. 56
The coefficient of x2 in1+x2/(1-x)3 is
If p and q are the coefficients of xn in (1+x)2n-1 and (1+x)2n respectively then 2p=
C0+C1/2+C3/3+ …………Cn/n+1+ =
The positive integer which is just greater than (1+0.0001)10000 is
The coefficient of x10 in 1-2x+3x2/1-x is