[微積] 熱騰騰的台聯99..
※ [本文轉錄自 Math 看板 #1CE5OVO_ ]
作者: a88241050 (再回頭已是百殘身) 看板: Math
標題: [微積] 熱騰騰的台聯99..
時間: Sat Jul 10 19:14:35 2010
剛考完,快累死了
基本上還算可以,沒有很複雜的題目
不過有幾題不確定,上來問一下
Find the surface area of the portion S of the zone z^2=x^2+y^2,where z≧0,
contained within the cylinder y^2+z^2≦1
單選就這題沒把握,其他都還好
問答:
1 dx
∫ ----------- 收斂還發散?
0 x-sinx
我寫說因為他大於1/x的積分
1/x的積分發散,因此原題發散,不知道可不可以0.0
x^2 y^2
Find the maximum area of a rectangle inscribed in the ellipse -----+------ = 1
9 25
老實說我完全不知道這題要幹啥囧
我同學說是找橢圓內接三角形的面積最大值
真假?三角形不是triangle嗎?
三題請教各位了
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