交换积分次序后，∫1edx∫0lnxf(x，y)dy=()
交换积分次序后，∫1edx∫0lnxf(x，y)dy=()
A、∫10dy∫ee2f(x，y)dx
B、∫0edy∫0ef(x，y)dx
C、∫01dy∫eyef(x，y)dx
D、∫0edy∫eyef(x，y)dx
【正确答案】：C
【题目解析】：由{1≤x≤e 0≤y≤lnx得{0≤y≤1 ey≤x≤e,故∫1edx∫0lnxf(x,y)dy=∫01dy∫eyef(x，y)dx．
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