A. 1+2a2/3x2
B. 2+3a2/4x2
C. 3+4a2/5x2
D. 1-2a2/3x2
(√2+1)6+(√2-1)6=
3.C0-5.C1+7.C2-9.C3+…………(n+1) terms =
Larger of 199100+200100and 201100 is
The coefficient of x7 in (1-2x+3x2-4x3+……..∞)-4 is
The 3rd term of 4 (3x-y3)is
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