If (1 + ax)n = 1 + 8x + 24 x2 + ........ then the value of a and n is
2,4
2,3
3,6
1,2
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
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
None of these
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
For all n ∈ N, n2 + n is a
Odd natural number
Even natural number
Can't be defined
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
is equal to.
100
120
-120
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
If the 4th term in the expansion of is independent of x , then n is equal to
5
6
9
Tenth term of the expansion (2x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
