Bài 1.16 Cho X1 = (1, 2, 4) , X2 = (−1, 0, 2)
X3 = (1, 4, 10) , X4 = (2, 2, 1)

1. Tính hạng của hệ bốn vectơ trên.
2. Biết rằng: A1 = X1, A2 = X1 + X3, A3 = X1 + X2 − X4. Hãy biểu diễn
tuyến tính X3 qua các vectơ A1, A2, A3.

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.