V (x , y , z) = 10xyz - (x^2)z + 10y(z^2) -20
find the grad of V.
if i transfer to the form below the how do i associate the -20 with ?
10xyz ax - (x^2)z ay + 10y(z^2) az -20
anyone able to help?
is the answer 10yz - 0 + 20yz ?