Mathematics
Grade10
Easy
Question
Find the domain of the pair of ordered pairs {(2,8),(3,27),(4,64)}
- {27,64}
- {8,27,64}
- {3,4}
- {2,3,4}
Hint:
The given question is about ordered pairs. When we take a Cartesian product of two sets, we get collection of the ordered pairs. Order pair has two elements. The first element is from the first set and the second element is from the first set. The second element is from second set. We are given a collection of ordered pairs. We have to find the domain of the pair of ordered pairs.
The correct answer is: {2,3,4}
The ordered pairs are {(2,8),(3,27),(4,64)}
The first element of the ordered pair is an element of a domain.
So, the set of the first elements from the ordered pairs is the set of the domain.
The set of the first elements of the given ordered pairs is {2, 3, 4}.
So, the domain for the given question is {2, 3, 4}.
For such questions, we should know the concepts of sets, domain, ordered pair and range.
