育明小学舞蹈队员身高记录单:
编号 | 身高/cm | 编号 | 身高/cm | 编号 | 身高/cm | 编号 | 身高/cm |
1 | 139 | 6 | 127 | 11 | 127 | 16 | 146 |
2 | 136 | 7 | 134 | 12 | 138 | 17 | 149 |
3 | 128 | 8 | 124 | 13 | 136 | 18 | 129 |
4 | 142 | 9 | 126 | 14 | 130 | 19 | 143 |
5 | 134 | 10 | 140 | 15 | 135 | 20 | 129 |
身高段/ | 120~129 | 130~139 | 140~149 | ||||
人数 |
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