Precalculus January 17, 2007

Solving equations algebraically Solve

Algebraic solutions Solve

Graphical solutions Solve

Inequalities Algebraically Solve

Inequalities with technology Solve

Relations & Functions A relation is a correspondence between two sets. Let X and Y be two non-empty sets. A function from X to Y is a relation that associates with each element of X exactly one element of Y.

Domain & Range of a function

Domain Definition Easier to describe where function is not defined. –Can’t divide by 0. –Can’t take the square root of a negative number.

Graph the circle

Operations on Functions Sum Difference Product Quotient

Difference Quotient The difference quotient of f(x) is given by