Consider the vector field F = (x2 + y2, 3xy). Compute the line integrals ∫c_1 F · dr and ∫c_2 F · dr, where c1 (t) = (t, t2) and c2(t) = (t, t) for 0 ≤ t ≤ 1. Can you decide from your answers whether or not F is a gradient vector field? Why or why not?
Is F conservative?