甲、乙、丙、丁四数之和 | 甲、乙、丙、丁四数之比 | 甲数 | 乙数 | 丙数 | 丁数 |
17 | 2∶3∶5∶7 | ||||
22 | 4∶3∶1∶3 | ||||
36 | 3∶2∶5∶8 | ||||
38 | 12∶1∶2∶4 | ||||
52 | 5∶2∶2∶4 | ||||
90 | 6∶5∶4∶3 |
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