A. 1
B. 2
C. 3
D. 4
If the 3rd, 4th and 5th terms of (x+a)n are 720, 1080 and 810 respectively then (x,a,n)=
xn-1 is divisible by x-k. Then the least +ve integral value of K is
The point which divides the line segment joining the points( 1,-1,2), (2,3,7) in the ratio -2:3 is
The first three terms in the expansion of (1+x+x2)10 are
C0+4.C1+7.C2+……(n+1) terms =
The number of terms which are free from radical signs in the expansion of (x1/5+y1/10)55 is
If the third term in the expansion of (1/x+ xlog10 x)5 is 1, then x=
2.C0+22.C1/2+23.C3/3+……..+2n+1.Cn/n+1 =
If n is odd then C02-C12+C22-……….+(-1)n Cn2 =
Coefficient of x50 in (1+x)1000+2x(1+x)999+3x2(1+x)998+……..+1001x1000 is