Let F=4yi+5xj​,ϕ=2x³+4xy, and h=y−3x².
Find each of the following:
F−∇ϕ=____
∇h=​ ____
How are F−∇ϕ and ∇h related?
F−∇ϕ=____∇h
(Note that this shows that F−∇ϕ is parallel to ∇h.)