Question
To which subset of real numbers does -18 NOT belong?
irrational
rational
integer
irrational
rational
integer
Answers
GPT-4o mini
The number -18 does not belong to the subset of **irrational** numbers.
To clarify:
- **Rational numbers** are numbers that can be expressed as a fraction of two integers (e.g., -18 can be written as \(-18/1\)).
- **Integers** are whole numbers that can be positive, negative, or zero (e.g., -18 is an integer).
- **Irrational numbers** are numbers that cannot be expressed as a simple fraction, such as \(\sqrt{2}\) or \(\pi\).
Since -18 can be expressed as a fraction and is a whole number, it does not belong to the subset of irrational numbers.
To clarify:
- **Rational numbers** are numbers that can be expressed as a fraction of two integers (e.g., -18 can be written as \(-18/1\)).
- **Integers** are whole numbers that can be positive, negative, or zero (e.g., -18 is an integer).
- **Irrational numbers** are numbers that cannot be expressed as a simple fraction, such as \(\sqrt{2}\) or \(\pi\).
Since -18 can be expressed as a fraction and is a whole number, it does not belong to the subset of irrational numbers.