Exam-style question
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Which set is represented by ℝ?.
- A.The set of natural numbers only
- B.The set of rational numbers only
- C.The set of all real numbers, including natural, rational and irrational numbers
- D.The set of irrational numbers only
Model answer
What a good answer should say
- The set of all real numbers, including natural, rational and irrational numbers
Explanation
Why this works
ℝ denotes the set of real numbers. It includes the natural numbers, the rational numbers and the irrational numbers.
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