Choose which set or sets the following number belongs to. Be sure to account for ALL sets.

Question

Choose which set or sets the following number belongs to.  Be sure to account for ALL sets.
StartRoot 18 EndRoot

A. rational​ numbers, real numbers
B. irrational numbers
C. rational numbers
D. real numbers
E. irrational​ numbers, real numbers

GPT 3.5 · Answer

The number √18 is a positive square root, so it belongs to both the set of irrational numbers and the set of real numbers (since all irrational numbers are also real numbers). Therefore, the correct answer is option E. irrational​ numbers, real numbers.