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
The value of (0.99)15 is
0.8432
0.8601
0.8502
None of these
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
Tenth term of the expansion (2x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
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
If n is even , then the middle term in the expansion of is 924 x6 , then n is equal to
10
14
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 of (3 + 2√5)18 - (3 - 2√5)18 is
11 terms
10 terms
9 terms
8 terms
The sum of the coefficient in the expansion of (1+x - 3x2)2163 will be
0
1
-1
22163
6th term in expansion of is
