推 keith291:Hint:x^3-1=(x-1)(x^2+x+1) 用分項分式法 218.166.63.95 06/11 21:19
→ midarmyman:(x^2+x+1)要用到arctan代換嗎? 140.117.198.78 06/11 21:21
推 bryant780301:當然^^ 118.165.130.82 06/11 21:25
→ midarmyman:QQ 140.117.198.78 06/11 21:28
→ midarmyman:不用吧?!我文你看看我解法 140.117.198.78 06/11 21:34
→ midarmyman:噢 我錯了 要用到! 140.117.198.78 06/11 21:40