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I know the answer... But I don't know why.

What is the answer? Maybe it'll refresh my memory ^^ heh

I cant get the del sign in latex :/

its ummm nambla i think.. \nambla

i thought it was \del

nabla*

i'll try :)

nope thats an upside down triangle

Yah that's the... del operator :o
do you want the one with the vector arrow above it..? :o

\frac{ dy }{ dx } = -\frac{\del f /\del x}{\del f/\del y}

i mean like the one used on http://en.wikipedia.org/wiki/Partial_derivative

\[\partial \]

ahhh \partial

\[\Huge\frac{ dy }{ dx } = -\frac{\partial f /\partial x}{\partial f/\partial y}\]

Oh sorry i didn't notice u already found it, hehe

oo, yours is fancy, i dont know what the nabla is though, thats okay...

Yah i been trying to figure out latex the last couple of weeks :) it's kinda interesting

very interesting.. i'm pressured to use it for one of my math classes, i try to avoid it.. :)

anyways, do you get the question?

haha, thats okay.. i'll learn that when i get to that.