① | ② | ③ | |
面积/cm² | 12 | 12 | 12 |
长/cm | 12 | ||
宽/cm | 1 |
① | ② | ③ | |
周长/cm | 14 | 14 | 14 |
长/cm | 6 | ||
宽/cm | 1 |
(1)长方形的面积一定,长方形的长与宽成反比例吗?为什么?
(2)长方形的周长一定,长方形的长与宽成反比例吗?为什么?
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