## This file contains the Python code from Program 2.7 of# "Data Structures and Algorithms# with Object-Oriented Design Patterns in Python"# by Bruno R. Preiss.## Copyright (c) 2003 by Bruno R. Preiss, P.Eng.  All rights reserved.## http://www.brpreiss.com/books/opus7/programs/pgm02_07.txt#def geometricSeriesSum(x, n):    sum = 0    i = 0    while i <= n:        sum = sum * x + 1        i += 1    return sum