A. 4C2(3x)2(-y3/6)2
B. 4C2(3x)2(-y2/6)2
C. 4C2(3x)3(-y3/6)2
D. 4C2(3x)3(-y2/6)2
5th term of (2x2+3/x)5 is 10. Then x=
The coefficient of xn in(1+x)2/(1-x)2 is
The term independent of x in (x+1/x)6 is
The sum of the coefficients of even powers of x in the expansion of (1+x+x2)15 is