f(x) = x³ / 4 - x
a = 5 (slider from -5 to 5, step 0.1)
g_1(x) = f(x) + a
A: (-1, f(-1))
B: (-1, g_1(-1))
C: (1.5, f(1.5))
D: (1.5, g_1(1.5))
u = Vector(A, B)
v = Vector(C, D)
b = 2 (slider from -2 to 2, step 0.01)
g_2(x) = b f(x)
c = 5 (slider from -5 to 5, step 0.1)
h_1(x) = f(x - c)
d = -1 (slider from -5 to 5, step 0.1)
h_2(x) = b f(x / d)
k(x) = abs(g_1(x))