[問卦] 有沒有部分積分法的八卦?
如題
部分積分法
integration by part
u dv = uv - v du
看起來好厲害
我都不知道原理是什麼
只知道直接拿來用!
比如說積分ln x dx
就可以用integration by part求出答案為
x (ln x ) - x +C
好神奇啊!
所以有沒有部分積分法的八卦
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