Use bracket notation to give the set {n ∈ N | n > 3} - {n ∈ Z | n < 5} in a finite listed form.
Understand the Problem
The question is asking how to represent the set defined by natural numbers greater than 3, minus the set of integers less than 5, using bracket notation in a finite listed form.
Answer
The result set is $$ \{5, 6, 7, 8\} $$.
Answer for screen readers
The final set in finite listed form is:
$$ {5, 6, 7, 8} $$
Steps to Solve
- Identify the sets involved
The first set is defined as $ { n \in \mathbb{N} | n > 3 } $, which consists of natural numbers greater than 3.
The second set is $ { n \in \mathbb{Z} | n < 5 } $, which consists of integers less than 5.
- List the elements of the first set
The natural numbers greater than 3 are:
$$ {4, 5, 6, 7, 8, \ldots} $$
This set continues indefinitely with all natural numbers above 3.
- List the elements of the second set
The integers less than 5 are:
$$ { \ldots, -2, -1, 0, 1, 2, 3, 4 } $$
This set contains all integers less than 5, including negative integers.
- Subtract the second set from the first set
Now, we need to subtract the integers less than 5 from the natural numbers greater than 3.
Since the integers less than 5 include 4, we must remove it from the first set. The resulting set will be:
$$ { n \in \mathbb{N} | n > 3 } - { n \in \mathbb{Z} | n < 5 } = {5, 6, 7, 8, \ldots} $$
- Express the final set in finite listed form
Since we typically express sets in finite notation, we can represent the final set containing just the first few elements:
$$ {5, 6, 7, 8, 9, \ldots} $$
But to provide a finite listing, we can write it as:
$$ {5, 6, 7, 8} $$
The final set in finite listed form is:
$$ {5, 6, 7, 8} $$
More Information
This answer represents the set of natural numbers greater than 3 after excluding the integers less than 5. The result is finite since we listed only the first few members of the infinite set.
Tips
- Overlooking negative integers: Ensure to consider all integers when identifying the second set.
- Inclusion of excluded elements: Make sure to confirm that elements like 4 are removed from the first set.
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