re: [重积] 96 联合 计算第2题

楼主: BaBi (迅雷不及掩耳盗铃)   2013-07-07 18:01:28
∫∫ e^-(x^2+y^2) dA
D
π 2
= ∫ ∫ e^-(r^2) rdrdθ
0 0
e^4 - 1
= (π)(

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