f(x) =

f(x) = (1 / 3 * x^(3)) - x^(2) + 4 / 3
P = Point(f)
x0: x(P)
y0: y(P)
gL: -4
f1(x) = f'(x)
m0: f'(x0)
t0: ((-x0) * m0) + y0
Y: (0 | t0)
Eingabefeld1 = Textfield(f)
x1: (y0 * (1 - 1 / m0))
X: (x1 | 0)
t(x) = (m0 * (x - x0)) + y0
gU: 0