### Home > A2C > Chapter 12 > Lesson 12.3.1 > Problem 12-129

12-129.

Find the sum of the geometric series defined by *t*(*n*) = 30000(1.03)^{n}^{ − 1} from 1 to 25

and the sum of the geometric series defined by *t*(*n*) = 60000(1.03)^{n}^{ − 1} from 1 to 15.