Posted: 09/10-2006 22:09
goorgoor wrote:beklager så mye...
gjord en stor tabbe:
f(x) = [tex] e^{ - x}\over x[/tex]
f ' (x) = [tex](- e^{-x})x - e^{- x}\over {x^2}[/tex] = [tex](- x - 1)e^{- x}\over {x^2}[/tex]
f ' (x) = [tex](- e^{-x})x - e^{- x}\over {x^2}[/tex] = [tex](- x - 1)e^{- x}\over {x^2}[/tex]