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
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 (a + b + c)n will be
n + 1
n + 3
None of these
If the coefficients of x2 and x3 in the expansion of (3 + ax)9 be same, then the value of a is
3/7
7/3
7/9
9/7
If n is even , then the middle term in the expansion of is 924 x6 , then n is equal to
10
12
14
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 number of terms in the expansion of (1 + 6x + 9x2)23 is
24
46
47
48
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
Cuberoot of 217 is
6.01
6.04
6.02
In the expansion of , the term containing x4 is
70 x4
60 x4
56 x4
