(a)[5]
Find the tenth term in the progression, and give your answer correct to 3 significant figures.
(b)[2]
Determine the exact sum to infinity of the progression.
Mathematics 9709 · AS & A Level · Series
Series — practice question
In a geometric progression, the third term is 18 and the total of the first three terms is 26. The common ratio is stated to be negative.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Use two suitable equations taken from the GP information, for example $ar^2=18$ and $a+ar+ar^2=26$.” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI