• anonymous
Find the directional derivative of $f(x,y,z) = yz + x^4$ at (2,3,1) in the direction of vector v=i+j+k. I have gotten as far as finding the directional derivative (gradient) at (2,3,1) which is: 32i+3j+k I dont know how to do the second part of this problem. What does it mean to find this direction? What do I have to do to the gradient to find it? My book is very vague, please help!
Mathematics

Looking for something else?

Not the answer you are looking for? Search for more explanations.