Answer:
80, 90, 85, 95, 100, 95, 105, 100, 110, 105, .....
Explanation:
There are two arithmetic sequences combined in a single sequence.
(1) 80, 85, 90, 95.....
It's an arithmetic sequence with the common difference = 5 in each successive term.
Therefore, next two terms of the sequence will be 100, 105
(2) Other sequence is 90, 95, 100, 105........
This sequence has common difference = 5 in each successive term.
next two terms of the sequence will be 110, 115.....
So by combining both the arithmetic sequences we will find the original sequence as 80, 90, 85, 95, 100, 95, 105, 100, 110, 105, .....