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 n is even , then the middle term in the expansion of is 924 x6 , then n is equal to
10
12
14
None of these
The number of terms in the expansion of (1 + 6x + 9x2)23 is
24
46
47
48
The value of the expression x5 + 10 x4a + 40 x3 a2 + 80 x2a3 + 80 x a4 + 32 a5 is
(x + a)5
(3n + a)5
(x + 2a)5
(x + 2a)3
The value of (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
6th term in expansion of is
Cuberoot of 217 is
6.01
6.04
6.02
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
Tenth term of the expansion (2x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
If the ratio of the coefficient of third and fourth term in the expansion of (x - 1/2x )n is 1 : 2 , then the value of n will be
18
16
-10
