Question

Gradient of f = 1/y (i) + [x/-y^2+1/z (j)]+y/-z^2 (k)

P=(2,2,4)

What is the maximum rate of change of f at the point P?

Answer 1

I know the unit vector is sqrt36 which is 6, but how do I apply that?

Answer 2

You don't just plug in (2,2,4) to the x,y,z...