Answer:
5 and - 2.5
Step-by-step explanation:
Note that consecutive terms have a common ratio, that is
- 40 ÷ 80 = 20 ÷ - 40 = - 10 ÷ 20 = - 0.5
This indicates that the sequence is geometric.
To find the next term in the sequence multiply the previous term by the common ratio, thus
- 10 × - 0.5 = 5
5 × - 0.5 = - 2.5
