For what value(s) of kkk is the vector field F⃗(x,y,z)=(2yz+kx,2xz,2xy)\vec{F}(x,y,z) = (2yz + kx, 2xz, 2xy)F(x,y,z)=(2yz+kx,2xz,2xy) conservative in all of R3\mathbb{R}^3R3?
0 only
any real kkk
k=0k=0k=0 or k=2k=2k=2
no value of kkk