39 | 41 | 35 | 30 | 44 | 52 | 43 | 46 | 45 |
38 | 47 | 42 | 41 | 50 | 39 | 47 | 42 | 48 |
46 | 45 | 44 | 39 | 36 | 42 | 32 | 41 | 43 |
51 | 48 | 40 | 34 | 40 | 43 | 38 | 49 | 45 |
47 | 43 | 38 | 39 | 45 | 37 | 35 | 43 | 34 |
(1)根据上面的信息完成下表。
体重段/kg | 35以下 | 35-39 | 40-44 | 45-49 | 50及以上 | 合计 |
人数/人 |
(2)这个班同学的体重在
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