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
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 the coefficient of 7th and 13th term in the expansion of (1 + x ) n are equal , then n is equal to.
10
15
20
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
6th term in expansion of is
None of these
The value of (1.002)12 upto fourth place of decimal is
1.0242
1.0245
1.0004
1.0254
Cubroot of 217 is
6.01
6.04
6.02
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
is equal to.
100
120
-120
The number of terms in the expansion (a + b + c)n will be
n + 1
n + 3