每块地砖的面积/m2 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | … |
所需地砖的数量/块 | 900 | 600 | 450 | 360 | 300 | … |
(2)如果每块地砖的面积是0.8m2,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