[積分]

[Qmmm (Ｓ＝Ｋ＊ｌｎΩ)]

90清大

(11%)

Find the surface area of the solid D be obtained

by revolving about the x-axis the region bounded

by y=x^(-2/3) and the x-axis to right of x=1; t-

hat is,x≧1

















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◆ From: 219.70.179.23
推 matmoki:∫1~∞∫0~x^(-2/3) 2πy dydx
→ matmoki:上面是算體積的 推錯 XD 下面才是算表面積
→ matmoki:∫1~∞ 2πy√(1+(y')^2) dx
→ matmoki:積分項有點醜  來算看看  XD
推 OKOK98:這題好像積不出來的樣子....
→ Qmmm:11% 蠻多分的@@
推 darkstar0412:這題有白目到@@