…… | |||||
直线条数 | 1 | 2 | 3 | 4 | … |
分成的块数 | 2 | 4 | 7 | … |
(1)若在一张圆形纸片上画4条直线,最多能把它分成
(2)若在一张圆形纸片上画6条直线,最多能把它分成
(3)若在一张圆形纸片上画n条直线,最多可以分成
(4)如果想分成56块,至少需要画
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