1 answer
(click or scroll down)
The correct sequence-function matches are:
1. 5, 10, 15, 20, ... corresponds to a_n = 5 + 5(n-1)
2. -5, 10, -20, 40, ... corresponds to a_n = 5 - 2(n-1)
3. 5, 3, 1, -1, ... corresponds to a_n = -5(3)^n-1
4. -5, -15, -45, -135, ... corresponds to a_n = -5(3)^n-1