If n N ,Then 23n - 1 is divisible by
2
3
5
7
If in the expansion of (1 + x )n , the coefficient of rth and (r + 2)th term be equal , then r is equal to
2n
n/2
Cuberoot of 217 is
6.01
6.04
6.02
None of these
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
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
The sum of the coefficient in the expansion of (1+x - 3x2)2163 will be
0
1
-1
22163
The value of (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
The number of terms in the expansion of (1 + 6x + 9x2)23 is
24
46
47
48
If the 4th term in the expansion of is independent of x , then n is equal to
6
9
If n∈N ,then x2n-1+y2n-1 is divisible by
x+y
x-y
x2+y2
x2+xy
