Question

For each set, given below, state whether it is finite set, infinite set or the null set:

$A=\{A=\text{x : x is an integer between 1 and 2.}\}.$

Answer 1

Step: Check whether the given set is finite set, infinite set or the null set

Given:

A= {x : x is an integer between 1 and 2}.

There is no integer between 1 and 2.

∴ No element is present in set A.

And we know that the set with no element in it, is called the empty set or null set.

Hence, the given set is a null set.