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
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
If the 4th term in the expansion of is independent of x , then n is equal to
5
6
9
None of these
The sum of the coefficient in the expansion of (1+x - 3x2)2163 will be
0
1
-1
22163
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
Cube root of 217 is
6.01
6.04
6.02
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
is equal to
100
120
-120
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
The value of (0.99)15 is
0.8432
0.8601
0.8502