Question

If $I$ is the set of all integers greater than $0,$ then $n\left(I\right)=$, and the set is

• A. $\infty$
• B. an infinite set
• C. $10$
• D. a finite set

Answer 1

Answer: (A), (B)

an infinite set

$I$ is the set of all the integers greater than $0.$
So, In Roster form, it can be written as:
$I=\{1,2,3,4,5,...\}$
Here, the elements of the set $I$ keeps on going till infinity.
Hence, the Set $I$ is an infinite set and $n\left(I\right)=\infty .$