# straight line

3. Evaluate 2. Evaluate I = J.(z2 + yº) ds, where c is the straight line from (2, 1) to the origin. f (sin(a) 1(x) + 3y²) dx + (2x – e=y?) dy, where c is the boundary of the half-disk x2 + y2 sa?, y = 0, positively oriented. 4. Calculate the flux of Ě = (x² + y²)1 + (y2 – z²); + zk out of the sphere of radius a, centered at the origin. | xy dx+yz dy+zx dz around the triangle with vertices (1,0,0), (0, 1,0), (0,0,1), positively oriented (when viewed from above). 5. Evaluate I 1. Determine whether F(x,y) has a potential function, if so, find f(x, y) such that Vf(x, y) = F(,y) F(x, y) = (3.r– 2y?, -4ry + 3)

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