Sequence and difference sequence

A quadratic sequence a(n) = pn² + qn + t (red) and its difference sequence (green). Note how they behave exactly like a function and its derivative when varying the sliders.

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com

Andreas Bauer, 19. November 2010, Created with GeoGebra