Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Hey guys! I would just like to ask if my partial differentiating is correct.
f(x,y)=xy (sin (4yx^2))
fyx = sin 4yx^2 + (8yx^2)(cos 4yx^2) + (12yx^2)(cos 4yx^2)  32(x^4)(y^2)(sin 4yx^2)
Thanks!
 one year ago
 one year ago
Hey guys! I would just like to ask if my partial differentiating is correct. f(x,y)=xy (sin (4yx^2)) fyx = sin 4yx^2 + (8yx^2)(cos 4yx^2) + (12yx^2)(cos 4yx^2)  32(x^4)(y^2)(sin 4yx^2) Thanks!
 one year ago
 one year ago

This Question is Closed

ash2326Best ResponseYou've already chosen the best response.0
You have differentiated with respect to x or y?
 one year ago

imagreencatBest ResponseYou've already chosen the best response.0
Well, fyx. So I first diff with respect to y then with respect to x. :)
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
it's the mixed derivative? let me check...
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
\[f_x=y\sin(4yx^2)+8x^2y^2\sin(4x^2y)\cos(4x^2y)\]I'm typing it out so we can all see if I make a mistake...
 one year ago

imagreencatBest ResponseYou've already chosen the best response.0
Fy first. :) Then diff Fy with respect to x.
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
the order shouldn't matter I don't think\[f_{xy}=\sin(4yx^2)+4yx^2\cos(4yx^2)+\frac{\partial}{\partial y}[8x^2y^2\sin(4x^2y)\cos(4x^2y)]\]
 one year ago

imagreencatBest ResponseYou've already chosen the best response.0
Actually in some cases the order does not matter. But in others, it does. Anyway, thank you turing test! :)
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
oh but I have a 16...
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
I'll do it the other way on paper to see if that makes a diff
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
ok I redid it the other way and got the same answer as you sorry for the confusion
 one year ago

imagreencatBest ResponseYou've already chosen the best response.0
It's okay Turing Test. I'm sorry for taking some of your time. :))) But, thanks again. I appreciate your effort.
 one year ago

TuringTestBest ResponseYou've already chosen the best response.2
no it's my fault for messing up the first time you're welcome
 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.