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
Tenth term of the expansion (2x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
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
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
The value of (0.99)15 is
0.8432
0.8601
0.8502
The number of terms in the expansion of (1 + 6x + 9x2)23 is
24
46
47
48
If n N ,then x2n-1+y2n-1 is divisible by
x+y
x-y
x2+y2
x2+xy
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n + 1)
1/n - 1
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
