(1)①若点在原点时,则点到的距离、点到的距离的和为________.
②若点在、两点之间,则点到的距离、点到的距离的和为________.
(2)如图,数轴上一点在点的右侧,且与点始终保持相距18个单位长度.
①点对应的数为________.(用含的代数式表示)
②当________时,点与点的距离、点与点的距离的和为48?
(3)结合前面问题的思考下面问题:(、为有理数)
①的最小值是________;的最小值是________.
②若,求的最大值是________.
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