[考古] 台大92碩
1/2 1-x (x+y)^2
∫ dx ∫(x-y)^2 e dy (用 u=x+y v=y-x 代換)
0ꄠ x
我代換後積分範圍變的有點怪異~~不過硬算後得到 1/12
不知對不對???THX~~^^
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