題目 10. (10%) Evaluate the line integral ∫C(x−y)dx+(x+y)dyx2+y2,\int_C \frac{(x-y)dx+(x+y)dy}{x^2+y^2},∫Cx2+y2(x−y)dx+(x+y)dy, where CCC is the curve r(t)=(2−t,1+2t), 0≤t≤1r(t)=(2-t,1+2\sqrt{t}),\ 0\le t\le 1r(t)=(2−t,1+2t), 0≤t≤1. 解答
