nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
The number of terms in the expansion (a + b + c)n will be
n + 1
n + 3
None of these
6th term in expansion of is
If n N ,then x2n-1+y2n-1 is divisible by
x+y
x-y
x2+y2
x2+xy
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 N ,Then 23n-1 is divisible by
2
3
5
7
The value of (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
If the 4th term in the expansion of is independent of x , then n is equal to
6
9
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
If n is even , then the middle term in the expansion of is 924 x6 , then n is equal to
10
12
14
