数理方程复习参考手册 2020春数理方程08班 3.8分离变量法求解基本解 40 3.9方向导数 3.10变量代换的定义域问题 44 4课程作业易错题总结… 46数理方程复习参考手册 2020 春数理方程 08 班 3.8 分离变量法求解基本解 ································································· 40 3.9 方向导数 ··················································································· 42 3.10 变量代换的定义域问题 ································································ 44 4 课程作业易错题总结 ············································································· 46 3