月份 家庭 | 1 | 2 | 3 | 4 | 5 | 6 |
甲家庭 | 45 | 50 | 40 | 31 | 30 | 28 |
乙家庭 | 36 | 42 | 37 | 32 | 27 | 30 |
(2)甲家庭( )月份使用塑料袋最多,( )月份使用塑料袋最少。
(3)乙家庭6月份使用塑料袋的数量是2月份的( )。(填最简分数)
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