Question

In which direction is the directional derivative equal to zero?

Answer 1

Hey!
Ur answer is :-
Direction along with the given vector .


#riShu:-)

Answer 2

This being zero means to find any vector v⃗ v→perpendicular to the gradient then you can normalize u⃗ =v⃗ /|v⃗ |u→=v→/|v→| it to make it a unit