E(x) = p(x)·x = (100 - 10·x)·x = 100·x - 10·x^2
G(x) = E(x) - K(x) = (100·x - 10·x^2) - (4·x^3 - 34·x^2 + 99·x + 6) = - 4·x^3 + 24·x^2 + x - 6
G(x) = 0 --> x = 0.5 (Gewinnschwelle) ∨ x = 6 (Gewinngrenze)
Flächeninhalt
∫ (x = 0.5 bis 6) (- 4·x^3 + 24·x^2 + x - 6) dx = 415.9