A. 1

B. 2

C. 3

D. 4

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+x^{2})^{10} are

C_{0}+4.C_{1}+7.C_{2}+……(n+1) terms =

The number of terms which are free from radical signs in the expansion of (x^{1/5}+y^{1/10})^{55} is

If the third term in the expansion of (1/x+ xlog_{10} x)^{5} is 1, then x=