(1)判断并直接写出抛物线经过、、中的点,并求出的值.
(2)点是轴上一点,点是抛物线的顶点,连接,,,是否存在一点,使得?若存在,求出点的坐标;若不存在,说明理由.
(3)点在抛物线上运动,在线段上取一点,使得,过点作轴的垂线交抛物线于点,在线段的延长线上取一点,使得,求点的运动轨迹的解析式.
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