If (1 + ax)n = 1 + 8x + 24 x2 + ........ then the value of a and n is
2,4
2,3
3,6
1,2
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
None of these
The number of terms in the expansion (a + b + c)n will be
n + 1
n + 3
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
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
The expansion of by binomial theorem will be valid if
x < 1
|x| < 1
-2/√3 < x < 2/√3
The value of (0.99)15 is
0.8432
0.8601
0.8502
If the 4th term in the expansion of is independent of x , then n is equal to
5
6
9
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 (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
