The sum of an infinite geometric series with first term a and common ratio

Question

The sum of an infinite geometric series with first term

a and common ratio r < 1 is given by . The sum

of a given infinite geometric series is 200, and the

common ratio is 0.15. What is the second term of this

series?

F. 25.5

G. 30

H. 169.85

J. 170

K. 199.85

Answer 1

S = a₁ / (1 - r)

200 = a₁ / ( 1- 0.15)

200 = a₁ / 0.85

170 = a₁

a₂ = ?