推 a016258:不太懂問題... 用 j 跟 k 可以嗎? 140.112.90.229 05/11 20:41
→ BaBi:沒意思吧...不然卡氏座標為什麼用x,y? 125.233.16.98 05/11 20:42
→ lovehan:就只是個符號而已 (?) 59.104.180.91 05/11 21:31
推 powernba:毫無疑問,就只是符號而已。122.118.249.164 05/11 21:53
推 craig100:part intergral? integration by parts? 119.14.33.204 05/12 01:32
→ goshfju:應該是by parts 111.251.87.138 05/12 08:49