Df = {x ∈ R/ -3 ≤ x ≤3} e lmf = {y ∈ R / -4 ≤ y ≤ 4}. Df = {x ∈ R / -4 ≤ x ≤ 4 } e Imf = {y ∈ R / -3 ≤ y ≤ 3 }. Df = {x ∈ R/ - 4 ≤ x ≤ 3} e Imf = {y ∈ R / -3 ≤ y ≤ 4}. Df = { x ∈ R /-3 < x ≤ 3} e lmf = {y ∈ R / -4 ≤ y ≤ 4}. Df = { x ∈ R /-3 ≤ x ≤ 4 } e lmf = {y ∈ R / -2 ≤ y ≤4 }.