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 x and y are two sets such that n (x) = 17, n(y) = 23 and n ( XUY) = 38. find n (X∩Y).
1
2
3
4
The smallest set A such that A∪{1,2} = {1,2,3,5,9} is
{2,3,5}
{3,5,9}
{1,2,5,9}
none of these
Let U = { 1, 2, 3,4, 5, 6, 7, 8, 9, 10}. A = {2, 4, 6, 8} and B = { 3, 4, 5, 6}Find ( A∪B)'.
{ 1, 3, 5, 7, 9, 10}
{1, 2, 9, 10}
{7, 9, 10}
{1, 7, 9, 10}
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
Let A = { 1, 3, 5, 7, 9} and B = { 3, 4, 5, 6} and U = { 1, 3, 5, 7, 9}. find ( A-B)
{7,9}
{3,5}
{1,7,9}
If the sets A and B are defined as A = {(x,y): y = ex , x∈R} B = { (x,y): y = x, x∈R} then
B⊆A
A⊆B
A∩B = ∅
A∪B = A
if f(x) = 1/x+1 g(x) = -x then gof is
-x + 1
-1/x+1
-(x + 1)
x2 - 1
If n(A) = 3 and n(B) = 6 and A ⊆ B, then the number of elements in A∪B is equal to
9
6
If A and B are disjoint,then n(A∪B) is equal to
n(A)
n(B)
n(A) + n(B)
n(A) * n(B)