Important Number Systems

 Important Number Systems

-Natural   0, 1, 2, 3, 4, ... or 1, 2, 3, 4, ...
-Integers  ..., −5, −4, −3, −2, −1, 0, 1, 2, 3, 4, 5, ...
-Rational   ^a⁄_b where a and b are integers and b is not zero
-RealThe limit of a convergent sequence of rational numbers
-Complexa + bi or a + ib where a and b are real numbers and i is the square root of −1