Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Multicalculus problem.
let f(x,y)=(xy)/(x+y), find the directions u and the values of Duf(1/2,3/2) for which
a) Duf(1/2,3/2) =is largest
b) Duf(1/2,3/2) = 0
c) Duf(1/2,3/2)=1
 one year ago
 one year ago
Multicalculus problem. let f(x,y)=(xy)/(x+y), find the directions u and the values of Duf(1/2,3/2) for which a) Duf(1/2,3/2) =is largest b) Duf(1/2,3/2) = 0 c) Duf(1/2,3/2)=1
 one year ago
 one year ago

This Question is Closed

HokiehighBest ResponseYou've already chosen the best response.0
directional derivative
 one year ago

cinarBest ResponseYou've already chosen the best response.1
Df=(2y/((x+y)^2,2x/(x+y)^2) (2y/((x+y)^2,2x/(x+y)^2).(1/2,3/2)
 one year ago

cinarBest ResponseYou've already chosen the best response.1
(2y/((x+y)^2,2x/(x+y)^2).(1/2sqrt2,3/2sqrt2)
 one year ago

HokiehighBest ResponseYou've already chosen the best response.0
I think I see what your saying. Thank you
 one year ago

cinarBest ResponseYou've already chosen the best response.1
sorry (2y/((x+y)^2,2x/(x+y)^2).(1/sqrt10,3/2sqrt10)
 one year ago

cinarBest ResponseYou've already chosen the best response.1
(2y/((x+y)^2,2x/(x+y)^2).(1/sqrt10,3/sqrt10)
 one year ago

cinarBest ResponseYou've already chosen the best response.1
2/sqrt10(1/(x+y)) I guess this is the answer..
 one year ago

cinarBest ResponseYou've already chosen the best response.1
I just looked at this web site http://tutorial.math.lamar.edu/Classes/CalcIII/DirectionalDeriv.aspx#PD_DirectDeriv_Ex2a
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.