The value of the expression x5 + 10 x4a + 40 x3 a2 + 80 x2a3 + 80 x a4 + 32 a5 is
(x + a)5
(3 n + a)5
(x + 2 a)5
(x + 2 a)3
The constant term in the expansion of is
479
517
569 cm3
581
If in the expansion of (1 + x )n , the coefficient of rth and (r + 2)th term be equal , then r is equal to
2 n
n/2
If , then 121n- 25n +1900n - (-4)n is divisible by
1904
2000
2002
2006
nc0 - 1/2 nc1 + 1/3 nc2 - ........ + (-1)n is equal to
n
1/n
1/(n+1)
1/(n-1)
Last two digit of the natural number
19
29
39
81
Tenth term of the expansion (2 x - y)71 is
-220 x2 y9
220 x2 y9
220 x2 y10
-220 x3 y9
If Cr = , then is equal to
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 (1 + a x)n = 1 + 8 x + 24 x2 + ........ then the value of a and n is
2, 4
2, 3
3, 6
1, 2
