Question

这经济数学道题咋算? 🙏

麻烦手写一下🙏🙏🙏

Answer 1

利润 L = (P-3)Q = 20(P-3)(6-P) = - 20(P-3)(P-6) = - 20(P^2-9P+18) = - 20[(P-9/2)^2-9/4] = 45 - 20[(P-9/2)^2, P = 9/2 时 利润最大为 45

Answer 2

利润 L = (P-3)Q = 20(P-3)(6-P) = - 20(P-3)(P-6)
= - 20(P^2-9P+18) = - 20[(P-9/2)^2-9/4]
= 45 - 20[(P-9/2)^2, P = 9/2 时 利润最大为 45