Question 2
A GP has first term 15 and common ratio \(\displaystyle - \frac{2}{3}\).
Explain why it converges and find its sum to infinity.
Find \(S_3\) and the signed remainder \(S_\infty-S_3\). State whether \(S_3\) is above or below the limit.
Complete-answer checking, worked solutions and indicative written criteria.
Open the complete answer form