If the coefficients of x2 and x3 in the expansion of (3 + ax)9 be same, then the value of a is
3/7
7/3
7/9
9/7
If p and q be positive , then the coefficient of xp and xq in the expansion of ( 1 + x ) p+q will be
Equal
Equal in magnitude but opposite in sign
Reciprocal to each other
None of the above
The value of (0.99)15 is
0.8432
0.8601
0.8502
None of these
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
If the coefficient of 7th and 13th term in the expansion of (1 + x ) n are equal , then n is equal to.
10
15
18
20
Cuberoot of 217 is
6.01
6.04
6.02
If n N ,then x2n-1+y2n-1 is divisible by
x+y
x-y
x2+y2
x2+xy
The value of (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
If n N ,Then 23n-1 is divisible by
2
3
5
7
