Cf

Cf '

x_1

x_2

x_3

x1 = 

x2 = 

x3 = 

C_f

C_f '

0

1

1

c = -5 (slider from -5 to 5, step 0.1)
f(x) = x^(4) + 0.1 * x^(3) + c * x^(2) + x + 1
g(x) = f'(x)
A, C, D = Intersect(g, xAxis)
h = Line(A, yAxis)
B = Intersect(f, h)
i = Segment(B, A)
j = Line(C, yAxis)
k = Line(D, yAxis)
E = Intersect(f, j)
F = Intersect(f, k)
l = Segment(F, D)
m = Segment(C, E)
f1 = If(g(x) < 0, f)
g1 = If(g(x) < 0, g)
g2 = If(g(x) > 0, g)
O = (0, 0)
G = (1, 0)
H = (0, 1)