if and
is an empty set.
contains exactly one element.
contains exactly two elements.
contains more than two elements.
As we learnt in
FUNCTIONS -
A relation f from a set A to a set B is said to be a function if every element of set A has one and only one image in set B.
-
Put at the place of
(i)
(ii)
Multiplying (i) by 2
and
Correct option is 3.
Option 1)
is an empty set.
Option 2)
contains exactly one element.
Option 3)
contains exactly two elements.
Option 4)
contains more than two elements.