If `\vec A = xz^2\hat i + 2xy\hat j + 3xz\hat k` Then find `\nabla  \times \vec A(or\,curl\,\vec A)` at the point (1, 2, 1) Solution: We kno...

In what direction from the point (1,2,1) is the directional derivative of  `\varphi  = xy^2z + x^2y` a maximum? What is the magnitude of thi...