Write the vector ū= (4, 1, 2) as a linear combination where v₁ = (1, 0, -1), v₂ = (0, 1, 2) and v3 = (2,0,0). Solutions: λ₁ = 1₂ λ3 = || ū = λ₁ū₁ + λ₂Ū2 + λ3Ū3