售价x(元/千克) | … | 2.5 | 3 | 3.5 | 4 | … |
需求量(吨) | … | 7.75 | 7.2 | 6.55 | 5.8 | … |
③1~7月份该蔬菜售价(元/千克),成本(元/千克)关于月份t的函数表达式分别为,,函数图象见图2.
请解答下列问题:
(1)求a,c的值.
(2)根据图2,哪个月出售这种蔬菜每千克获利最大?并说明理由.
(3)求该蔬菜供给量与需求量相等时的售价,以及按此价格出售获得的总利润.
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2