In the binomial expansion of (a - b)n, n ≥ 5, the sum of 5th and 6th terms is zero, then a/b equals.
n-5/6
(n-4)/5
5/(n-4)
6/(n-5)
The number of terms in the expansion of (1 + 6 x + 9 x2)23 is
24
46
47
48
Last two digit of the natural number
19
29
39
81
For all n ∈ N, n2 + n is a
Odd natural number
Even natural number
Can't be defined
None of these
The number of terms in the expansion (2 x - 3 y)5 is
5
6
10
30
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n+1)
1/(n-1)
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
12
-10
The coefficient of rth and (r + 4)th terms are equal in the expansion of (1 + x)20 then the value of r will be
7
8
9
The remainder when 22006 + 2007 is divided by 17 is
11
13
14
10n + 3.4n + 2 + 5 is divisible by
3
4
15
