[積分] 請問^^"

[ATK (表特版是好物XD)]

    1
S--------dx=?
  1-X^2

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◆ From: 218.164.101.131
※ 編輯: ATK             來自: 218.164.101.131      (02/27 00:19)
推 FATTY2108:........
→ ATK:我知到很笨=   =
推 wilson1000:(1/2)log|1+x|-(1/2)log|1-x|+C
推 ATK:怎麼導T_T
推 wilson1000:分解成 (1/2)/(1-x)+(1/2)/(1+x)
推 ATK:感謝<(_ _)>
推 GBRS:令X=sinA,dX=cosAdA,解到最後代入原假設還原...