Texas Instruments
Texas Instruments: Trivialization and Dynamisation
This activity will illustrate how classic exercises from elementary vector geometry can be solved using the Computer Algebra System CAS tool.
Wolfram Research
Wolfram Math World: Negative Binomial Series
This site explains the negative binomial series, the series which arises in the binomial theorem for negative integer n.
Wolfram Research
Wolfram Math World: Binomial Series
This site provides definitions and examples of binomial series.