numpy 线性方程组求解、矩阵数乘、矩阵乘法、逆矩阵、方阵LU分解

numpy 线性方程组求解、矩阵数乘、矩阵乘法、逆矩阵、方阵LU分解python 代码以下：3d # 3x + y = 9 # x + 2y = 8 import numpy as np import scipy as scipy from scipy import linalg a = np.array([[3,1],[1,2]]) b = np.array([9,8]) result =

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