学习和掌握用直接三角分解法解线性方程组；

熟悉运用用直接三角分解法解线性方程组解决实际问题。

- Learning and mastering the direct triangular decomposition method for solving linear equations　



熟悉运用用直接三角分解法解线性方程组解决实际问题。



Familiar with the use of direct triangular decomposition of linear equations to solve practical problems.