设L为折线OAB,其中O(0,0),A(1,1),B(1,0),求曲面积分∫LxydS.
设L为折线OAB,其中O(0,0),A(1,1),B(1,0),求曲面积分∫LxydS.
【正确答案】:∫LxydS=∫OAxydS+∫ABxydS =∫01x2√2dx+∫01ydy =(√2/3)x301+(1/2)y201 =√2/3+1/2.
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