If f(x) = 3x and g(x) = 3/x then gof is
x
x/3
3/x
1/x
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
(A')' =
U
A
None
A - (B∪C) =
(A - B) - (A - C)
(A - B) ∪ (A - C)
(A - B) ∩ (A - C)
(A - B) - (A ∩ C)
Given f(x)= ax + 2, g(x) = 3x + 1 and fog = gof, then the value of a is
2
3
5
1
If f(x) = 3x, g(x) = x + 1, then fog is
3x + 1
x + 3
3x + 3
3x
The number of proper subsets of the set {1,2,3} is
8
7
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)
Let n(∪) = 700, n(A) = 200, n(B) = 300 and n(A∩B) = 100 then n(A'∩B' )
400
600
300
200
The number of non - empty subsets of the set {1,2,3,4} is
15
14
16
17
