推 ntust661 :確定是表面雞?@@ 07/18 14:03
→ vexchy :我po英文題目上來 07/18 14:06
※ 編輯: vexchy 來自: 111.240.130.19 (07/18 14:07)
2 lnx
y = 2x - ----- + 19 1≦x ≦e
16
對y軸旋轉...
怎麼改成x = f(y).. 還是說我方向錯了><"? 求救求救
Find the area of the surface obtained by rotating the curve , about
(a) the x-axis
(b) the y-axis
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