Letting $W$ stand for the set of whole numbers, I the set of integers, $I ^ { + }$the set of positive integers, and $I ^ { - }$the set of negative integers, perform the indicated operation.
-Find $\mathrm { I } ^ { + } \cap \mathrm { I } ^ { - }$
A) $\mathrm { I } ^ { - }$
B) $\mathrm { I } ^ { + }$
C) I
D) $\varnothing$

Question

Quizplus · Accepted Answer

The intersection of the set of positive integers ($I^+$) and the set of negative integers ($I^-$) is the empty set ($\varnothing$), as there are no elements that are both positive and negative.

Letting WWW Stand for the Set of Whole Numbers, I the Set

Letting $W$ Stand for the Set of Whole Numbers, I the Set