If f:Z→Z be defined by f(x) = -x, then f is
in to function
One - one and on to function
Many to one function
Identity function
If A = {a, c, e, g} B = {b, d, e, f} then A - B =
{b, d, f}
{g}
{f}
{a, c, g}
If n(A) = 3 and n(B) = 6 and A ⊆ B, then the number of elements in A∪B is equal to
3
9
6
none of these
If A = [x:x is a multiple of 3] and B = [x:x is a multiple of 5], then A - B is
Ac∩B
A∩Bc
Ac∩Bc
(A∩B)c
Which of the following is a null set ?
{0}
{x:x>0 or x<0}
{x:x2 = 4 or x=3}
{x: x2 + 1 = 0, x∈R}
If f(x) = 2x - 3 g(x) = x + 1 then fog is
2x - 2
2x + 2
2x - 1
2x + 1
Given A and B are sets and A - B = A, then
A and B are disjoint sets
A and B are over lapping sets
B is a subset of A
A is the subset of B
The domain of the function f = {(1,2)(2,3)(3,4)(4,5)} is
{1,2,3,4}
{2,3,4,5}
{1,2,3,5}
{1,3,5}
If A and B are any two sets, then A∩ (A∪B) is equal to
A
B
Ac
Bc
Let A and B be two non empty subsets of a set X,such that A is not a subset of B, then
A is always a subset of the complement of B
B is always a subset of A
A and B are always disjoint
A and the complement of B are always non - disjoint
