推 youyouyou:我算0 61.229.248.177 07/18
→ aether982:how? 220.136.68.151 07/18
→ youyouyou:用卡式座標dzdydx這樣機 61.229.59.62 07/18
→ youyouyou:有先用div 用dzdydx 雞(2+cosx) 61.229.59.62 07/18
推 shrack:請問在球內怎麼用dzdydx積cosx阿^^ 220.139.243.21 07/19