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设L为椭圆x²/a²+y²/b²=1顺时针方向路径，则∮(x+y)dx-(x-y)dy=()

高老师2年前 (2024-03-26)高等数学（工本）(00023)14

设L为椭圆x²/a²+y²/b²=1顺时针方向路径，则∮(x+y)dx-(x-y)dy=()

A.-4πab

B.-2πab

D.2πab

正确答案是D

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