f

f'

f''

f

f

g(x) = (1 / 6 * x^(4)) - x^(2)
g1(x) = g'(x)
g2(x) = g''(x)
P3 = Point(g)
P1 = Point(y = 0)
x1: x(P1)
P2 = Point(y = 0)
x2: x(P2)
x3: x(P3)
gl1: x = x1
gl2: x = x2
gl3: x = x3
b = false
gL: -5
gR: 5
gU: -2.5
gO: 2.5
A, B, C = Extremum(g)