Question

The first term of a geometric series is 350 if the sum to infinity is 250 find the common ratio

Answer 1

Explanation:

S∞=a1−r

(Sum to infinity of a GP)

250=3501−r⟹250(1−r)=350

350=250−250r⟹350−250=−250r

250r=−100⟹r=−100250=−25