ziehe Q auf der x-Achse

b0(x) = (1 - x)^(3)
b1(x) = ((3 * x) * (1 - x)^(2))
b2(x) = ((3 * (1 - x)) * x^(2))
b3(x) = x^(3)
s1(x) = b0(x) + b1(x)
s2(x) = s1(x) + b2(x)
s3(x) = s2(x) + b3(x)
t = 0.5756791875092331
Q: (t, 0)
f = OrthogonalLine(Q, xAxis)
B3 = Intersect(b3, f)
B2 = Intersect(b2, f)
B1 = Intersect(b1, f)
B0 = Intersect(b0, f)
S0: B0
S1: (t, s1(t))
S2: (t, s2(t))
S3: (t, s3(t))
g = Segment(S0, Q)
h = Segment(S1, S0)
i = Segment(S2, S1)
j = Segment(S2, S3)
a(x) = x < 0
b(x) = x > 1
c(y) = y < 0
d(y) = y > 1