作者Qmmm (Ｓ＝Ｋ＊ｌｎΩ)
看板trans_math
标题[积分]
时间Sun Mar 8 22:10:35 2009
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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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 219.70.179.23
1F：推 matmoki:∫1~∞∫0~x^(-2/3) 2πy dydx122.117.188.214 03/08 22:16
2F：→ matmoki:上面是算体积的 推错 XD 下面才是算表面积122.117.188.214 03/08 22:29
3F：→ matmoki:∫1~∞ 2πy√(1+(y')^2) dx122.117.188.214 03/08 22:30
4F：→ matmoki:积分项有点丑 来算看看 XD122.117.188.214 03/08 22:30
5F：推 OKOK98:这题好像积不出来的样子....140.114.216.145 03/08 23:04
6F：→ Qmmm:11% 蛮多分的@@ 219.70.179.23 03/08 23:05
7F：推 darkstar0412:这题有白目到@@ 220.134.79.28 03/10 20:23