(1)请直接写出a,b,c的值:_____;_____;_____.
(2)在数轴上a,b,c所对应的点分别为A,B,C.
①记A,B两点间的距离为,则_____;_____.
②点P为该数轴的动点,其对应的数为x,点P在点A与点C之间运动时(包含端点),则____;____.
(3)在(1)(2)的条件下,若点M从A出发,以每秒1个单位的速度向终点C移动,当点M运动到点B时,点N从A出发,以每秒3个单位长度向点C运动,N点到达C点后,再立即以同样的速度返回点A设点M移动时间为t秒,当点N开始运动后,请用含t的代数式表示M,N两点间的距离.
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