Tiny4388 Tiny4388 23-05-2023 Mathematics contestada 25 and 27 25-28 Find the gradient vector field Vf of f. 25. f(x, y) = y sin(xy) ( 26. f(s, t) = 12s + 3t 21. f(x, y, z) = 1x2 + y2 + z2 1.5 = 28. f(x, y, z) = x?yeX/: