The function f satisfies f(n) = 3f(n - 2) - 2f(n - 1), where f(2) = 3 and f(1) = -1. What is the value of f(5)?
+128474 f(n) = 3f(n - 2) - 2f(n - 1)
f(2) = 3
f(1) = -1
f(3) = 3f(3 - 2) - 2f(3 - 1) = 3f(1) - 2f(2) = 3(-1) - 2(3) = -3 - 6 = - 9
f(4) = 3f(4 - 2) - 2f(4 - 1) = 3f(2) - 2f(3) = 3(3) - 2(-9) = 9 + 18 = 27
f(5) = 3f(5 - 2) - 2f(5 - 1) = 3f(3) - 2f(4) = 3(-9) - 2(27) = -27 - 54 = -81
