每块地砖的面积/平方米 | 0.1 | 0.2 | 0.3 | 0.5 | 0.6 | … |
所需地砖的数量/块 | 300 | 150 | 100 | 60 | 50 | … |
(2)如果每块地砖的面积是0.4平方米,铺这一地面需要多少块地砖?
(3)铺这一地面用了200块地砖,所用的地砖每块面积是多大?
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