A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
Find the partial derivative of f(x,y)=(3x+3y)e^y
anonymous
 5 years ago
Find the partial derivative of f(x,y)=(3x+3y)e^y

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0y'[x] == (3 E^y + Derivative[1, 0][f][x, y])/(3 E^y + 3 E^y x + 3 E^y y  Derivative[0, 1][f][x, y])

Zarkon
 5 years ago
Best ResponseYou've already chosen the best response.2\[f_x=3e^y\] \[f_y=(3x+3y)e^y+3e^y\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0f'x = 3e^y(3x+3y) f'y = 3e^y(3x+3y)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0why dn't you just multpply them out... i beleive that zarkon is correct

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0outside inside rule e^y will stay e^y always, leave inside then multiply inside respect to x and y.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0zarkon is probably right though go with zarkon.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if you multiply it out Goat you get 3xe^y+3ye^y fx =3e^y + 0 fy=3xe^y+3e^y=3e^y(x+1)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0could be errors but i just did that without paper

Zarkon
 5 years ago
Best ResponseYou've already chosen the best response.2use the product rule for fy

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ahh yes both y's so yeah

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0but the first is correct

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yep i see thanks i am working on my understanding of this as well.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so how would I find fxx and fyy

Zarkon
 5 years ago
Best ResponseYou've already chosen the best response.2just take the derivative again

Zarkon
 5 years ago
Best ResponseYou've already chosen the best response.2\[f_{xx}=0\] \[f_{yy}=(3y+3x+6)e^y\]
Ask your own question
Sign UpFind more explanations on OpenStudy
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.