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
10
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n+1)
1/(n-1)
32n + 2 - 8n - 9 is divisible by
63
64
65
None of these
If p and q be positive , then the coefficient of xp and xq in the expansion of ( 1 + x ) p+q will be
Equal
Equal in magnitude but opposite in sign
Reciprocal to each other.
None of the above
If , then 121n- 25n +1900n - (-4)n is divisible by
1904
2000
2002
2006
Cube root of 217 is
6.01
6.04
6.02
6th term in expansion of is
The number of terms in the expansion (a + b + c)n will be
n + 1
n + 3
None of those
The sum of the coefficient in the expansion of (1+x - 3 x2)2163 will be
0
1
-1
22163
If Cr = , then is equal to
