If the 4th term in the expansion of is independent of x , then n is equal to
5
6
9
None of these
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
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
If n is odd then c02 - c12 + c22 - c32 + ............. + (-1)ncn2 is equal to
0
1
∞
n! / (n/2)2!
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 number of terms in the expansion (a + b + c)n will be
n + 1
n + 3
If n is even , then the middle term in the expansion of is 924 x6 , then n is equal to
10
12
14
Cube root of 217 is
6.01
6.04
6.02
6th term in expansion of is
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