3.
The first four terms of a sequence are shown below.
6, 2, -2, -6
Which of the following functions best defines this sequence? (4 points)
a) f(1) = 6, f(n + 1) = f(n) + 4; for n ≥ 1
b) f(1) = 6, f(n + 1) = f(n) - 2; for n ≥ 1
c) f(1) = 6, f(n + 1) = f(n) - 4; for n ≥ 1
d) f(1) = 6, f(n + 1) = f(n) + 2; for n ≥ 1
