f(x) =

\downarrow

h \rightarrow 0

f(x) = 2^(x)
Eingabefeld1 = Textfield(f)
h = 1 (slider from 0.00001 to 1, step 0.00001)
d(h) = (f(h) - 1) / h
g(h) = If[h > 0, d(h), ln(f(1))]
Text1: "\frac{" + (LaTeX[f(1)]) + "^h-1}{h} = " + (LaTeX[g(h)]) + " "
Text4: "c = " + (g(0)) + ""