∫-10dx∫-x2-x2f(x,y)dy+∫01dx∫x2-x2f(x,y)dy.

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问题-10dx∫-x2-x2f(x,y)dy+∫01dx∫x2-x2f(x,y)dy.

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答案如图8.12所示. [*] 原式=[*]f(x,y)dσ=∫01dy∫-yyf(x,y)dx+∫12dy[*]f(x,y)dx.

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