看板 trans_math 關於我們 聯絡資訊
題目是: Find the area of the region that lies that inside the circle r=1 and outside the cardioid r=1-cosθ 另外補充偷偷問一下 ∫(x^2)(e^x的平方)dx 要怎麼算 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 218.162.192.80
Serenede:用分部積分法 x=u xe^(x^2)=dv 140.112.242.85 06/16 16:29
Serenede:v=1/2e^(x^2) du=dx 140.112.242.85 06/16 16:30
Serenede:至於你那題可能只要分別算出兩個面積 140.112.242.85 06/16 16:32
Serenede:再減掉就好了 140.112.242.85 06/16 16:32
g10010010010:2倍(四分之一圓-心臟線0-pi/2 61.229.32.149 06/17 00:45
g10010010010:要用極座標∫(1/2)r^2dr 61.229.32.149 06/17 00:46
g10010010010: d矽塔 61.229.32.149 06/17 00:46