小棒长度 | 1号袋 | 2号袋 | 3号袋 | 4号袋 |
9cm | 8根 | 10根 | 3根 | 2根 |
7cm | 4根 | 3根 | 8根 | 12根 |
4cm | 4根 | 3根 | 5根 | 2根 |
(1)要使做成的长方体(或正方体)体积最大,应选用________号袋的材料.
(2)如果要将所做成的最大的长方体或正方体框架糊上纸,至少需要纸张多少平方厘米?
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