Mathematica, WolframAlpha, and Grapher provide tools for solving differential equations. But you don't get to see what's happening under the hood. Differential equations often don't have a tidy closed form solution, and a numerical method is needed. Euler's method requires … Continue reading

# Tag Archives: Educreations

Written solutions are available at the AP Exam question bank. Whiteboard screencasts for these problems: 2007 AP Free-response Form B, problem 1 2007 AP Free-response Form B, problem 2 2007 AP Free-response Form B, problem 3 If you would like … Continue reading

We use the second edition of this reformed calculus text for Calculus AB at Ypsilanti High School. Solutions to problems p 176, #6 p 176, #10 … Continue reading

The square root of two is irrational. That doesn't mean it is unreasonable. It just means it cannot be written as the ratio of two integers. We've known this since at least the time of the Pythagoreans of ancient Greece. … Continue reading