BrownMath.com → Algebra

# Algebra andAnalytic Geometry

Equations and Factoring How to Evaluate Functions with TI-83/84 How to Graph Functions on TI-83/84 How to Graph Piecewise Functions on TI-83/84 Inverse Functions on TI-83/84 How to Graph Your Data (statistics) How to Add Vectors Graphically on TI-83/84 How to Multiply Vectors on TI-83/84 Complex Numbers on TI-83/84 and Complex Numbers on TI-89 Fun with Complex Numbers (trigonometry) Elizabeth Stapel’s Purplemath has many modules with simple, practical explanations of topics in basic through advanced algebra. Have a sequence of numbers and need to know the general term? Consult N. J. A. Sloane’s On-line Encyclopedia of Integer Sequences. Is that quadratic equation in x and y a circle, an ellipse, a parabola, or a hyperbola? See The General Quadratic Equation by Silvio Levy. It’s part of his massive Geometry Formulas and Facts for both 2-D and 3-D objects. A “proof” that 1 = 2 Did π equal 3 in Indiana? What about the Bible? 0.999… equals 1, it does not “approach” 1. Here’s why.
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