(1)如图1,求抛物线的解析式;
(2)如图2,点在第一象限的抛物线上,其横坐标为,连接,交轴于点,点在线段上,连接、,,若面积为,求与的函数关系式(不写自变量取值范围);
(3)如图3,在(2)的条件下,点在第三象限的抛物线上,连接,过点作的平行线,交轴于点交轴于点,、在线段上,,,,求点的坐标.
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