What reclusive formula can be used to represent the sequence 2, 6, 10, 14, 18

a(n) = a(n-1) + 4

Step-by-step explanation:

a(1) = 2    The first term is 2

a(n) = a(n-1) + 4     We add 4 to the previous term or n-1

So, we get...

a(n) = a(n-1) + 4

a(1) = 2

a(2) = a(2-1) + 4    2(1) +4   = 6

a(3) = a(3-1) +4      3(2) + 4   = 10

and so on and so forth. I hope this helps.

the absolute value function