numpy的 solve()

import numpy as np a = np.array([[1,1,1],[0,2,5],[2,5,-1]]) print ('数组 a：') print (a) ainv = np.linalg.inv(a) print ('a 的逆：') print (ainv) print ('矩阵 b：') b = np.array([[6],[-4],[27]]) print (b) print ('计算：A^(-1)B：') x = np.linalg.solve(a,b) print (x) # 这就是线性方向 x = 5, y = 3, z = -2 的解