Recent content by Guero

aha! thanks, i get it now

mm, i get: 10y=-2x-4 and 10x=-2y+4 for each of which there are infinite solutions for x and y. i thought that if i combined the equations (no reason) it might do it, but i still got y=x-1

yay! I'm now a level 30 thumb twiddler

we're doing partial derivatives, and i thought i understood them until: f(x,y)=-x^2-y^2-10xy+4y-4x+2 we are meant to find and classify all local extrema. i got: f_x=-2x-10y-4 and f_y=-2y-10x+4 i've never had two variables at this stage, and i can't solve for any of the points. the...

ok, thanks

could someone explain how to find the real answer?

i didn't, i don't know how to

no prob, but is there really no solution?

how can the answer be x=0? e^{x}+e^{3x}-1=0 e^{0}+e^{3\times{0}}-1=0 1+1-1=0 1=0??

how do i solve e^x+e^{3x}-1=0 for x?

thanks. should've seen it.

how can i integrate: x^2+7x+10 dx x+2 i assume it's by substitution, but i can't work it out. sorry for the formatting, btw

Argh! I get it, Thanks! I feel pretty stupid now.

mm, I can see that, but I was looking for a proof that shows that e^pi > pi^e

I haven't been able to prove: ln(e)/e > ln(pi)/pi without calculating any of the values. Help would be much appreciated.