种类 | 香菇 | 排骨 |
A超市的价格(元/千克) | 5.2 | 33.8 |
B超市的价格(元/千克) | 5.8 | 44.2 |
(1)A超市的香菇比B超市的每千克便宜多少元?
(2)妈妈要做一道香菇排骨,需要食材:2千克排骨,1千克香菇.请你帮妈妈做一份最经济的购物方案(两种商品在一家超市购买).
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