Arithmetic and Geometric Sequences and Series

a denotes the first term; n denotes the number of terms
d is the common difference of the arithmetic progression/series
r is the common ratio of the geometric progression/series

Set a, n, d and r within limits and calculate the nth term and sum of n terms for both Arithmetic and Geometric series. Verify your calculation with that by GeoGebra.

Prabir K. Chandra, 23 February 2014, Created with GeoGebra