d(x) = f(x) - g(x)
d(x) = (0.5·x^3 - x^2 - 2.5·x + 6) - (- 1.5·x^3 + 3·x^2 + 7.5·x - 6)
d(x) = 2·x^3 - 4·x^2 - 10·x + 12
D(x) = 1/2·x^4 - 4/3·x^3 - 5·x^2 + 12·x
Schnittstellen d(x) = 0
2·x^3 - 4·x^2 - 10·x + 12 = 0
x = 3 ∨ x = -2 ∨ x = 1
∫ (-2 bis 1) d(x) dx = D(1) - D(-2) = 31.5
∫ (1 bis 3) d(x) dx = D(3) - D(1) = - 32/3
Fläche = 31.5 + 32/3 = 253/6 = 42.17