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<hamster68> how would one go about proving that any prime number can be written as the sum of five cubed integers?
<hamster68> I know that it's possible, but, for the life of me, I can't figure it out!
<Cin> Do prime numbers always end in a number less than 6?
<hamster68> no.
<servus> 7.
<nerdy2> prime numbers can end in 7 or 9
<hamster68> so far, I managed to prove that the sum can equal some odd integers,
<hamster68> but that's a far cry from being useful.
<nerdy2> hamster68, are you sure that the proof of this is easy? :)
<ivan`> in implicit differentiation, when differentiating with respect to x, why do the 'y' terms change?
<ivan`> one side is y*sin(1/y)
<krod> Greetings, is someone willing to help us with some linear programming?
<krod> i have a project due, and don't quite understand it
<aFlag> i know some linear programming
<aFlag> not much
<krod> its simple, 10th grade math ;)
<servus> (Don't ask to ask a question, just ask it?)
<krod> its a long word problem
<delta_> :)
<krod> it would flood if it where pasted
<servus> http://rafb.net/paste/
<lament> 10th grade linear programming?
<krod> thanks
<krod> http://rafb.net/paste/results/SoksDi63.html
<MagmaRules> hello
<MagmaRules> anyone uses octave ??
<krod> hi
<MagmaRules> im missing play
<MagmaRules> what do i need to install play ??
<MagmaRules> what package is it ?? -> linux
<krod> http://rafb.net/paste/results/SoksDi63.html .. any help?
<ivan`> i need help understanding why i can differentiate sin(y) with respect to x
<ivan`> i'm probably missing something obvious
<ivan`> i can write the answers correctly 90% of the time
<ivan`> oh i get it now
<ivan`> i think
<ivan`> sec
<krod> servus?
<lament> ivan`: for the same reason that you can differentiate 15 with respect to x
<ivan`> yay chain rule
<ivan`> ok
<servus> krod: Eh? Can you not solve that by substitution?
<krod> i think so, but i can't find the second equation?
<servus> krod: Have you tried graphing each equation on the same graph, and shade in the acceptable sides of each line, thus forming an area of the graph that is all combinations possible. From then, the answer should be apparent.
<krod> yes we have, but...
<krod> How many tables and chairs should be made in order to maximize the daily profit?
<servus> Find the highest point on the line profit = 150t + 125c for that system :)
<servus> By the way, your first equation should be more like 75t + 50c < 1200, not 150t + 125c = 1200
<krod> the teacher wants us to have two equations ;p
<Safrole> Chandra, you're not a student at Rutgers are you?
<krod> oh right..
<Chandra> Safrole, no sir...but any help needed? (I might be of some help :P)
<krod> er wait no, that would be our objective funtion, not a inequality
<Spyder222> how would I go about integrating sqrt(1+4x^2)*xdx?
<Safrole> I'm hearing a lot of good things about their graduate program
<Safrole> I'm thinking of applying there
<Chandra> Safrole, it's grad program is pretty good but no where near as Princeton or Uchicago (although I think Princeon is out of your list)
<Spyder222> it seems so easy, but i can't get the right answer..
<krod> Chandra, perhaps you can help us? ;)
<servus> krod: For your first system, ***ume that the axes are t and c, and solve each equation for t, then solve by substitution.
<Safrole> Why's Princeton out of my list? :)
<Chandra> Safrole, i don't know, that's what I remember you telling me couple of weeks ago
<Safrole> Yeah
<Safrole> MIT, Harvard, Princeton
<krod> oh
<krod> crap
<krod> the example she gave us was bad, but now that i have looked in the text book, i see it's examples
<Safrole> Someone was telling me that Rutgers picked up a lot of Russian mathematicians after the Soviet Union fell
<krod> thanks for your help, but we may need it in the near future ;)
<Chandra> Safrole, let me rephrase my self: It's one of the good ones in the tri-state area, but I doubt it's one of the noted once in the country, although they claim themselves as Public IVy
<Safrole> What's your opnion of Drexel University?
<Chandra> lol, don't go for it?
<Chandra> what's your GPA?
<Safrole> well that's a complicated issue
<Safrole> I went to community college for my first two years
<Safrole> my gpa there was 3.3
<Chandra> ok
<Safrole> I'm at Drexel now and my GPA is 3.8
<Safrole> so I don't know.. I guess both would be considered
<Chandra> but afaik GPA doesn't get carried right?
<Chandra> old once
<Safrole> No..
<Chandra> because you only get credits for the cl***es transfered not grade
<Safrole> but isn't my grad school going to want to see my transcripts from all schools attended
<Chandra> yes, but most of the stress is on Final undegrad transcript
<Safrole> I'm a junior now
<Safrole> I started at Drexel a year ago
<Safrole> so I can raise that GPA a little
<Chandra> good good, try to pull it upto 3.9 or something :)
<Spyder222> can someone please just tell me what method to solve Int(sqart(1+4x^2)*x*dx)?
<Safrole> I could recommendation letters from my department head
<Safrole> and several other faculty members
<Spyder222> *sqrt
<Safrole> Someone was selling me on Stanford as well
<swix> I get to make a math crib sheet, and I want to make it clever
<swix> a puzzle for my TAs to look at when the get it
<Chandra> perhaps we should take this to private
<Safrole> okay
<krod> servus, are you sure that would be the right equation?
<Chandra> Safrole, ding!
<Safrole> what does that mean Chandra?
<Safrole> I responded to your message
<Chandra> means, why aren't you responding to my msg :)
<Chandra> oh
<Safrole> It's because I'm unregistered
<Chandra> pelase register if you can ;)
<Safrole> freenode.net right?
<Chandra> /msg nickserv register <p***word>
<Safrole> ahh I forgot about that command thank you.
<krod> Chandra, could you take a look at http://rafb.net/paste/results/SoksDi63.html and tell me if i would need two equations for that (75t + 50c = 1200, and 150t+ 125c = 1200)
<Chandra> I can't stand bisuness stuff
<krod> its acually school work
<krod> just a problem they gave us
<taw_> hello
<taw_> how is this thing used in induction proofs called ?
<taw_> ^_^
<Safrole> what thing?
<joshk> maybe he's trying to say that "^_^" should be used in induction proofs
<taw_> uhm, the n-1 thing used to proof that the n case ;-)
<krod> any help Chandra, its a project due monday :|
<Buggaboo> krod: try to put that in a matrix.
<krod> we cant use matrices
<Buggaboo> krod: just use ol'fashioned linear algebra.
<krod> (we havn't learned it)
<krod> buggaboo, i know but i am not sure what equation to use
<Buggaboo> ... okay... wait, lemme get you a nice link you can try to emulate.
<krod> i understand how to do it, i am just not sure what equation to choose out of that word problem (see above)
<taw_> oh, the induction hypothesis probably ^_^
<Buggaboo> krod: have you tried drawing it already?
<krod> buggaboo, yes we have a feasible region, but i need to find:
<krod> and i know how to find it, i just need to pick the correct equation...
<Buggaboo> krod, check the corners.
<krod> from the word problem that is
<krod> i know,
<krod> but again, i need to find the objective function so i can subsitute
<Buggaboo> you're supposed to maximize the cost function right?
<Buggaboo> so just do it.
<ivan`> impDif(x^2+y^2,x,y) on my TI-89 titanium doesn't work
<ivan`> "Error: Argument error"
<krod> but i am unsure of what equation to use:
<ivan`> it's got the latest update i think
<Buggaboo> check the corners and use this profit function: 150t + 125c = ???
<krod> 75t + 50c = 1200 or 150t+ 125c = 1200
<ivan`> x and y are undefined too
<krod> Buggaboo: should i use the profit funtion for both of the questions the problem is asking?
<delta_> bye
<Buggaboo> krod: I think the word profit here is not the right one. Turnover - Costs = profit.
<krod> but it gives us how much profit is made on each chair and tbale
<krod> table*
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