linear system, using (0) = 0:
a.
C.
4x₁ + x₂x3 = 5,
-x₁ + 3x2 + x3 = -4,
2x1 + 2x2 + 5x3 = 1.
4x₁ + x₂x3 +
x4 = -2,
x₁ +4x2 X3 X4 = -1,
x4 = 0,
-x₁x₂ + 5x3 +
x₁x₂ + x3 + 3x4 = 1.
-
b.
-2x₁ + x₂ + x3 = 4,
x₁-2x2x3 =
x₂ + 2x3 = 0.
Fig: 1