https://www.geogebra.org/haftendorn
Haftendorn, Buch (Springer):
Kurven erkunden und verstehen
Kap 4.1.4.2: S. 88

Ha 2016

c: y = (-x^(2)) + 4
a: y = x^(2) / 4 - 1
B: (0, 0)
Q = Point(c)
b = Line(B, Q)
E_1, E_2 = Intersect(a, b)
P: (x(E_1), y(Q))
Ortslinie1 = Locus(P, Q)
e = Segment(E_1, P)
d = Segment(Q, P)
P': (x(E_2), y(P))
Ortslinie2 = Locus(P', Q)
f = Segment(E_2, P')
g = Segment(P', P)
h = false