What is R?
R and Q are different sets of numbers - IR is the set of real numbers , Q is the set of rational numbers .
Q contains all numbers that can be represented as a fraction of two integers. So about 5/2, 1/7, 12/89, etc. However, there are some numbers where this is not possible - for example, Pi. Pi is an irrational number (that is, it has infinitely many decimal places, the have no regularity as with periodic numbers).
R contains the rational numbers and the irrational numbers. These are basically all numbers that you {{link="https://essay4students.com/"}}learn{{/link}} at school. Of course, there are even larger numbers than R, but that's usually enough.
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