Question

{5, 3, 1, -1, ...} find a18

Answer 1

Answer: The numbers are decreasing by 2. So that means that the eighteenth number would be -29.

Explanation:

{5, 3, 1, -1, -3, -5, -7, -9, -11, -13, -15, -17, -19, -21, -23, -25, -27, -29...}