MATA02H3 Lecture Notes - Lecture 1: Rational Number, Real Number
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Positive numbers such as 1, 2, 3, etc. are called natural numbers. The symbol for natural numbers is n = {1, 2, 3 } There are also negative natural numbers , which are any negative numbers below the value of. Integers are symbolized as z = { 1, 2, 3} In short, integers is just a fancy way of saying whole numbers . Rational numbers are simply integers over integers. For example, a rational number is 4. A rational number equation is symbolized as q = { P and q symbolize integers; note that q can never be the value of 0 , as you cannot divide by zero ever. This is symbolized as q = { p q. P, q = z, q 0} Real numbers include all rational and irrational numbers; all possible numbers. Irrational numbers are all the numbers that are not rational numbers, including integers and natural.