MATH 111 Lecture Notes - Lecture 1: Quadratic Formula, Precalculus, Dependent And Independent Variables

• School: Emory University
• Department: Mathematics
• Course: MATH 111
• Professor: Huanhuan Yang

Document Summary

1476- lecture 1- pre-calculus, ways to represent a function. A + c = ad + bc = ad+bc d bd bd bd. X3+y3 = (x+y) (x2 - 2xy + y2) X3- y3 = (x-y) (x2 + 2xy + y2) common denominator difference of squares factorization sum of cubes difference of cubes. Quadratic formula: ax2+ bx + c = 0 ; a =/= 0, x = b (b. A function is a rule that assigns to each element x in a set d exactly one element, called. X= independent variable, d= domain, f(x)= dependent variable, e= range, Vertical line test: a way to test if a graph of something is a function. If a vertical line within the range can be placed in such a way that there are two points on the graph that touch the line, the graph is not a function.