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/sci/ - Science & Math

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File: 12 KB, 384x344, Maths.png [View same] [iqdb] [saucenao] [google]
961882 No.961882 [Reply] [Original]

Alright, /sci/

I've got this problem thats kicking my ass:

Find x and y that solve the following system:
ln(x^2+y) = 1 - y
xy = -sqrt(x)

Any help would be appreciated
Pic related; it's what matlab returned

>> No.961987

are you sure that is the problem?

>> No.962016

Yeah, that's what I said....
But yes, I am sure.

>> No.962044

learning real math instead of masturbating with matlab could help

>> No.962047

OP here

Apparently Wolfram is better than Matlab at solving. Still looking for an algebraic solution...

>> No.962052

The answer is phone. But who the fuck was he?

>> No.962070

>>962044
It's a matlab class; Math 451. We're currently doing Jacobi and Gauss-Seidel methods, but for some reason he's assigning this shit which isn't related.

>> No.962095

just from looking at it i can tell y=1 and x=0..don't know any way to solve for one or the other

>> No.962110
File: 23 KB, 566x545, maths2.png [View same] [iqdb] [saucenao] [google]
962110

>>962095
That's what I got, but I'm pretty sure he want's the other one...

>> No.962182

Your first problem is using Matlab for symbolic math.

Second, you don't know how to even use help for that specific function. The output is a god damned structure variable you moron.

>> No.962253
File: 13 KB, 384x344, maths3.png [View same] [iqdb] [saucenao] [google]
962253

>>962182
1) I know, it blows nuts with symbolic notation.
2) I know, if you open g.x and g.y it returns some wicked complex number, which isn't correct.

>> No.962264

What is an X???

>> No.962276
File: 4 KB, 347x203, motlob.png [View same] [iqdb] [saucenao] [google]
962276

>>962253
what sort of faggot matlab are you running?

>> No.962284

OP again, maybe some background will help;
I suck nuts at algebra, (inb4 dumb americunt), and I got x=0 and y =1 but realized that's an asymptote.
Went to the TI-89, which returned more symbolic crap.
Since this was a matlab class problem I figured I'd try matlab, which returned more complex crap.

All I want is some damn help solving this algebraically for the other answer, (x = 2.41, or whatever).

>> No.962286

>>962276
2009b

>> No.962352
File: 2 KB, 479x72, motlob.png [View same] [iqdb] [saucenao] [google]
962352

>>962284
>solving this algebraically
not going to happen