3 Explain the use of the symmetric difference and the complement of the symmetric difference. Let be given the two equations x1 ⊕ x1x2 ⊕ x1x2x3 ⊕ x1x2x3x4 ⊕ x1x2x3x4x5 = 0 and x1 ∼ x1x2 ∼ x1x2x3 ∼ x1x2x3x4 ∼ x1x2x3x4x5 = 0