User talk:137.248.153.117

Sure, there is another way to compute it. By calculating the derivative of a^x through the definition of derivative, we can know that (a^x)'=a^x*ln(a); when we make "a = e" and because ln(e)=1; so (e^x)' = e^x Hoping being helpful --Zbookx (discuss • contribs) 12:41, 8 December 2014 (UTC)