问题
单项选择题
设L是圆周x2+y2=a2(a>0)负向一周,则曲线积分(x3-x2y)dx+(xy3-y3)dy的值为:()
A.πa4
B.-πa4
C.-(π/2)a4
D.(π/2)a4
答案
参考答案:C
设L是圆周x2+y2=a2(a>0)负向一周,则曲线积分(x3-x2y)dx+(xy3-y3)dy的值为:()
A.πa4
B.-πa4
C.-(π/2)a4
D.(π/2)a4
参考答案:C