SOLUTION: I need the formula used n 1,2,3,4 f(n) 4,8,12,16

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Question 1118156: I need the formula used

n 1,2,3,4
f(n) 4,8,12,16
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
n    1, 2, 3,  4
f(n) 4, 8, 12, 16

Notice that each index increment makes f an increase of plus four.

Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.
f(n) = 4n.