作者reideen107 (理想一直都在)
看板trans_math
标题[考古] 高大96
时间Fri Jul 4 16:38:27 2008
7.Find (b) ∫(x+4) / x(x-2)(x+5) dx
算出来是 -2lnx/3 + 3ln(x-2)/5 + ln(x+3)/15
答案对吗？...不太会这种类型的题目@@
5.(a) Find the volume of the solid generated by revolving the region
between the y-axis and the curve x=2/y , 1≦y≦4 , about the y-axis.
(b)The region in the first quadrant enclosed by the parabola y=x^2 ,
the y-axis and the line y=1 is revolved about the line x=3/2 to
generate a solid. Find the volume of the solid.
9.Find the area of the region that lies inside the circle r=1 and
outside the cardioid r=1-cosθ.
烦请各位大大帮忙讲解..........感谢
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 118.171.123.171
1F：推 ht15trep:(-2/5)lnx+(3/7)ln(x-2)+(-1/35)ln(x+5)+ 124.8.22.4 07/04 21:34
2F：→ ht15trep:C 124.8.22.4 07/04 21:34
3F：→ ht15trep:ln里要是绝对值才对，忘记加了= = 124.8.22.4 07/04 22:36