Question

lim h-->0 ((e^-(x+h)) - (e^-x))/h

Answer 1

u have find it infinity @uselesscookies

Answer 2

think about derivative definition
\[\lim_{h \rightarrow 0}\frac{f(x+h)-f(x)}{h}=f'(x)\]

Answer 3

do you notice what f(x) is?

Answer 4

e^-x