Mathematics 9709 · AS & A Level · Series

Series — practice question

In a geometric progression, the first two terms add to $15$, and the sum to infinity is $\frac{125}{7}$. The common ratio is negative.

(main)[7]

Determine the third term of the progression.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply $a(1+r)=15$” …