If {(2, a), (b, 3)} represents an identity function then values of a and b are
2,2
3,2
2,3
3,3
Sets A and B have 3 and 6 elements respectively. What can be the minimum number of elements in A∪B ?
3
6
9
18
(A')' =
U
A
None
Let A = {1, 2, 3, 4,5,6}. Then which of the following is true?
8 A
4A
3 A
If A = { 3, 6, 9, 12, 15, 18, 21} and
B = { 4, 8, 12, 16, 20}. Find A- B.
{ 12, 16, 20}
{3, 6, 9}
{3, 6, 9, 15, 18, 21}
{ 12, 15, 21}
List all the elements of the set A = { x : x is an odd natural number}.
{ 1, 2, 3, 4, ---}
{2, 4, 6, 8, ---}
{ 1, 3, 5, 7, ---}
{ 0, 1, 3, 5, 7, - - -}
Write the set B = { 2, 4, 8, 16, 32} in the set - builder form.
{ x: x = 2^{n}; n N and 1 ≤ n ≤ 5 }
{x : x = 2n ; n N and 1 ≤ n ≤ 5 }
{x: x = n + 2; n N and 1 ≤ n ≤ 5}
{ x : x = n - 2 ; n N and 1 ≤ n ≤ 5}
If f(x) = 2x + 5, g(x) = 3x + m and fog = gof, then the value of m is
5
10
2
If A⊂B then A - B is
B
A∩B
∅
For any two sets A and B, ( A-B) U ( B- A) =
(A - B) U A
(B - A) UB
(AUB) - (A∩B)
(AUB) ∩ (A∩B)