设函数f(t)连续,且f(t)dt=4x2+9y2+12xy-2,并设点O(0,0)
题型:单项选择题
问题:
设函数f(t)连续,且
f(t)dt=4x2+9y2+12xy-2,并设点O(0,0),A(1,3),l为联结O与A的逐段光滑曲线,则曲线积分∫lxy2f(xy)dx+x2yf(xy)dy的值 ( ).
设函数f(t)连续,且
f(t)dt=4x2+9y2+12xy-2,并设点O(0,0),A(1,3),l为联结O与A的逐段光滑曲线,则曲线积分∫lxy2f(xy)dx+x2yf(xy)dy的值 ( ).