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Monoblaine




Posts: 205
PostPosted: Wed, 23rd May 2012 21:20    Post subject: Maths question
i seem to have forgotten how to find x minimum and x maximum, y minimum and y maximum of equation (x^2+y^2)=2xy i know im supposed to take partial derivatives but im stuck there. do i have to move 2xy left of = ?

Thanks in advance Smile
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Atropa




Posts: 878
PostPosted: Wed, 23rd May 2012 22:19    Post subject:
Your question doesn't make sense. x=y (for commuting x and y.)
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KillerCrocker




Posts: 20491
PostPosted: Wed, 23rd May 2012 22:21    Post subject:
yeah.. I've tried solving it out too.

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Monoblaine




Posts: 205
PostPosted: Wed, 23rd May 2012 22:24    Post subject:
well my question is calculate the paths in a double integral \\f(x,y) dxdy and equation for it is as follows (x^2+y^2)^2=2xy. so i figured i have to find the extremums of both x and y using partial derivatives. not sure if im on right path tho
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KillerCrocker




Posts: 20491
PostPosted: Wed, 23rd May 2012 22:29    Post subject:
Shit... if You would ask this question 2 years ago Very Happy It is easy stuff... was

3080, ps5, lg oled

Sin317-"im 31 years old and still surprised at how much shit comes out of my ass actually ..."
SteamDRM-"Call of Duty is the symbol of the true perfection in every aspect. Call of Duty games are like Mozart's/Beethoven's symphonies"
deadpoetic-"are you new to the cyberspace?"
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Sin317
Banned



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Location: Geneva
PostPosted: Wed, 23rd May 2012 22:32    Post subject:
x=1 y=2


easy...

wait ..


nm
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Atropa




Posts: 878
PostPosted: Wed, 23rd May 2012 22:56    Post subject:
Are you sure you haven't got a radius for the circle you are supposed to integrate over. It might be simpler if you switched to polar coordinates as well.
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Atropa




Posts: 878
PostPosted: Wed, 23rd May 2012 23:00    Post subject:
Maybe give us f(x,y)
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Monoblaine




Posts: 205
PostPosted: Thu, 24th May 2012 07:12    Post subject:
thats the thing, this is how he gave us the exercise

Find the paths of double integral

\\f(x,y) dx dy D=(x^2+y^2)^2<=2xy
D

thats it nothing more.
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Atropa




Posts: 878
PostPosted: Thu, 24th May 2012 09:11    Post subject:
0?
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spankie
VIP Member



Posts: 2958
Location: Belgium
PostPosted: Thu, 24th May 2012 10:03    Post subject:
here ya go

http://www.wolframalpha.com/
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