Resposta:
Explicação passo-a-passo:
1) 2, 3 e 4
2)
x = -3 => f(-3) = -3 + 2 = -1
x = -1 => f(-1) = -1 + 2 = 1
x = 0 => f(0) = 0 + 2 = 2
x = 2 => f(2) = 2 + 2 = 4
Im(f) = {-1, 1, 2, 4}
3)
x = -3 => f(-3) = 5.(-3) + 2 = -15 + 2 = -13
x = -2 => f(-2) = 5.(-2) + 2 = -10 + 2 = -8
x = -1 => f(-1) = 5.(-1) + 2 = -5 + 2 = -3
x = 0 => f(0) = 5.0 + 2 = 0 + 2 = 2
x = 1 => f(1) = 5.1 + 2 = 5 + 2 = 7
x = 2 => f(2) = 5.2 + 2 = 10 + 2 = 12
x = 3 => f(3) = 5.3 + 2 = 15 + 2 = 17
x = 4 => f(40 = 5.4 + 2 = 20 + 2 = 22
Im(f) = {-3, 2, 7, 12, 17, 22}
