[理工] [工數]-重積分
找了書本解答發現這題答案給 18
但是我算是54 不知道這之間是我觀念上有重大的誤會還是怎樣
煩請版眾幫我解決一下
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Please describe the region of integration and evaluate it.
3 y 2 2
∫∫ ( x + y )dxdy
0 -y
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