Lesson 1 - Irrational Numbers

Number Systems Natural Numbers: N = { 1, 2, 3, …} Whole Numbers: W = { 0, 1, 2 , 3, ...} Integers: I = {….. -3, -2, -1, 0, 1, 2, 3, ...}

Number Systems Cont… Rational Numbers: Irrational Numbers: Q = {non-terminating, non-repeating decimals} Real Numbers: R = {all rational and irrational} Imaginary Numbers: i = {sq. roots of negative numbers} Complex Numbers: C = {real and imaginary numbers}

Complex Numbers Real Numbers Q Imaginary Numbers Q: Irrational Numbers W N Imaginary Numbers I

Examples Natural #s: {1,…67,…280,…} Whole #s: {0,1,2,…} Integers: {…-899,-2,0,1989,…} Rational #s: ½, 1/9, 0.33 (terminating or repeating decimals) Irrational #s: √7,  = 3.14159265 3589 7932384626433832795… (non-terminating, non-repeating) ___ __ 3

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