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Chapter 13
Real and Complex Numbers
13.1 REAL NUMBERS
Roughly speaking, a real number is a value that represents a quantity on
the number line, and any point on the number line represents a real num-
ber. at is, the set of real numbers can be thought of as the set of all points
on an innitely long number line. Once we decide that a point on the line
represents zero, any point to the right from the zero point and any point to
the le from the zero point represent a positive real number and a negative
real number, respectively. e set of integers is properly included in the set
of rational numbers, and the set of rational numbers is prope ...