Math: Real Number and Absolute Value
Class 1: Numbers, Inequalities and Absolute Value (Appendix A)
Numbers, Our Playgroung in Math
Examples: 1 , 3 , 0.17, , 2
2
7
9 at 20 digits 1.2857142857142857143 =1.(285714)
7
indicates repetition
Notation:
Naturals:
Integers: =
..., 3, 2, 1, 0, 1, 2, 3, 4 , ...
Rationals: = m m Z and n Z\ 0
n
Real: (the set of ALL real numbers)
Irrational: \
(e.g., , 2 )
A = 1, 2, 3, 4, 5, 6 = x x is an integer and 0 x 7
B = 1, 3, 4.5, 7.555
={} an empty set, i.e., a set without any...
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