圆柱管个数 | 1 | 2 | 3 | … |
绳子长度 | 2πr | ( | ( | … |
请你完成上表:
(2)当圆柱管的放置方式是“两层叠放(每一个圆都和至少两个圆外切)”时,截面如图所示:
……请你完成下表:
圆柱管个数 | 3 | 4 | 5 | 6 | … |
绳子长度 | 6r+2πr | 8r+2πr | ( | ( | … |
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