作者ting301 (白算盘)
看板trans_math
标题[积分] 请教一些积分问题
时间Tue Apr 3 00:01:49 2007
∫∫ (x^2 + y^2) dxdy , D = {(x,y)属於R^2,(x-3)^2 + y^2 = 3^2 }
D
-(x^2 + 4y^2)
∫∫ e dxdy , D = {(x,y)属於R^2, x^2 + 4y^2≦1 }
D
Evaluate the area enclosed by
2 2 2 2
x y x y
--- + ---- = 1 and ---- + --- = 1
9 16 16 9
多谢了
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