4X4矩阵求逆：
import numpy as np
A = np.mat("1 2 3 0; 4 5 6 0; 9 8 10 0;0 0 0 1")
print("An", A)
inverse = np.linalg.inv(A)
print("inverse: n", inverse)
4X4矩阵求逆：
import numpy as np
A = np.mat("1 2 3 0; 4 5 6 0; 9 8 10 0;0 0 0 1")
print("An", A)
inverse = np.linalg.inv(A)
print("inverse: n", inverse)
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