作者kevin3529 (大杰)
看板Math
标题[微积] 微积分习题求解
时间Thu Mar 24 23:36:16 2011
let S be the region in the first quadrant bounded by curve xy=1, xy=3,
x^2-y^2=1,x^2-y^2=4,compute 在S的区域中 对X^2+Y^2积分(符号不会打><)
他有给HINT G(x,y)=(xy,x^2-y^2) what is |detDG|?
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1F：推 air11 :令u=x^2-y^2,v=xy,则|J|=1/(2(x^2+y^2)) 03/25 13:42