f(x)=

dx

f(x) = 4 - (0.25 * x^(2))
P = Point(f)
x0: x(P)
fx0: f(x0)
f1: f'(x0)
c = Circle(P, 0.2)
dx = 1 (slider from -5 to 5)
a = 1
P0: (a, f(a))
Text1: "f: " + (LaTeX[a]) + " \rightarrow " + (LaTeX[f(a)]) + ""
Eingabefeld1 = Textfield(f)
Eingabefeld4 = Textfield(dx)
t(x) = (f1 * (x - x0)) + fx0
Text2: "t(x) =" + t + ""
mt: f'(x0)
m = Slope(t)
Text6: "f'(" + (LaTeX[x0]) + ") = " + (LaTeX[f1]) + ""