计算对坐标的曲线积分∫C(x2-2xy)+(y2-2xy)dy,其中C为抛物线y=x2对府于x=-1到x=1的一段弧
∫C(x2-2xy)dx+(y2-2xy)dy=∫-11 (x22x•x2)dx+(x4-2x2)2xdx =∫-11(2x5-4x4-2x3+x2)dx =∫-11(x2-4x4)dx+ ∫-11(-2x3+2x5) =2∫01(x2+4x4)dx+0 =2[(1/3)x3-(4/5)x5∣01 =-(14/15)
计算对坐标的曲线积分∫C(x2-2xy)+(y2-2xy)dy,其中C为抛物线y=x2对府于x=-1到x=1的一段弧
∫C(x2-2xy)dx+(y2-2xy)dy=∫-11 (x22x•x2)dx+(x4-2x2)2xdx =∫-11(2x5-4x4-2x3+x2)dx =∫-11(x2-4x4)dx+ ∫-11(-2x3+2x5) =2∫01(x2+4x4)dx+0 =2[(1/3)x3-(4/5)x5∣01 =-(14/15)