A. 6nC3n(-x)3n
B. 2nCn(-x)3n
C. 5nC2n(-x)3n
D. 4nC3n(-x)3n
(1.03)19 =
x2n-1+y2n-1 is divisible by x+y if n is
If (1+x+x2)n = a0+a1x+a2x2+……..+a2nx2n then a02-a12+a22-……….+a2n2 =
(2n+1)C0-(2n+1)C1+…………. -(2n+1)C2n =
The coefficient of x2 in (1+x)2(8-x)-1/3 is
C02+3.C12+5.C22+……….+(2n+1).Cn2 =
1.nC0+41.nC1+42.nC2+43.nC3+……..+4n.nCn =
3.C0+7.C1+11.C2+……..+(4n+3).Cn =
(1.02)6 + (0.98)6 =
(2-)5 + (2+)5 =