wickedcherub: (frustration)
[personal profile] wickedcherub
I can't even do question 1 of my latest maths assignment AND IT LOOKS SO FUCKING EASY.

FIND THE LOCAL MAXIMUM AND MINIMUM POINTS OF THE FUNCTION:

f(x,y) = x2 + y2 + 1/(x2y2)


WHY I CAN'T I DO IT. WHYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY.

I have half a page of workings that go nowhere.

I WANT TO GO ALL BANKAI ON ITS ASS.

Date: 2007-05-07 05:15 am (UTC)
From: [identity profile] takewing.livejournal.com
I've forgotten all the math I ever knew since I finished calculus last year or I'd try and help. :|

Date: 2007-05-07 05:24 am (UTC)
From: [identity profile] kat8cha.livejournal.com
Er.....

O_O

I wish I could help... but I uh.... can't?

Have you tried plugging it into a graphing calculator?

Date: 2007-05-07 05:28 am (UTC)
From: [identity profile] akahannah.livejournal.com
FIND THE LOCAL MAXIMUM AND MINIMUM POINTS OF THE FUNCTION

I DON'T EVEN UNDERSTAND WHAT THAT QUESTION MEANS!!! ;_;

Date: 2007-05-07 06:24 am (UTC)
From: [identity profile] freesnowcone.livejournal.com
Best I got:
http://en.wikipedia.org/wiki/Maxima_and_minima#Finding_maxima_and_minima

Date: 2007-05-07 06:46 am (UTC)
From: [identity profile] seshat1.livejournal.com
I know I know how to do this. I looked at the wiki page to jog my memory which helped. But am unsure if you need to diff wrt x, y or both.

wrt x the function becomes
df/dx= 2x - 2y-2x-3
if that helps. Probably not! :D

Date: 2007-05-07 09:05 am (UTC)
From: [identity profile] o-chan.livejournal.com
where's my graphic calculator when you need it...

Date: 2007-05-07 01:53 pm (UTC)
From: [identity profile] bonzabud.livejournal.com
I used to be so good at maths, but I've forgotten EVERYTHING. It is not like riding a bike is it!

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