#範例4-3：計算4x4矩陣的行列式值
import numpy as np
A = np.array([
    [1,0,0,-1],
    [3,1,2,2],
    [1,0,-2,1],
    [2,0,0,1]
    ])
A_det = np.linalg.det(A).round()
print("A的行列式值=", A_det)
print("A的行列式值(四捨五入)=", A_det.round())