College Algebra (MATH 1148) Questions and Answers 100% correct

College Algebra (MATH 1148) Questions and Answers 100% correctS ymmetry a balance of form about some line or point X-axis symmetry A point (x, y) lies on a line with (x, -y) Y-axis symmetry A point (x, y) lies on a line with (-x, y) Origin symmetry A point (x, y) lies on a line with (-x, -y) Set A well-defined collection of objects which are called the 'elements' of the set. The Empty Set 0 = {} = {x|x ≠ x} Natural Numbers N = {1, 2, 3...} Whole Numbers W = {0, 1, 2...} Integers Z = {...-2, -1, 0, 1, 2...} Rational Numbers Q = {a/b | a ∈ Z and b ∈ Z and b ≠ 0} Irrational Numbers P = {x|x is a non-rational real number} OR a decimal that does NOT repeat or terminate. Real Numbers R = {x|x possesses a decimal} Complex Numbers C = {a | bi | a,b ∈ R and i = √-1} Intervals all the numbers between two given numbers (Example: the numbers between 1 and 6) Interval Notation write the beginning and ending numbers of the interval using square brackets "[" and "]" to include the end number and round brackets "(" and ")" when we don't