(1)求抛物线的解析式;
(2)如图,点在点右侧的抛物线上,其横坐标为,连接,射线交轴于点,设的面积为,求与的函数关系式;(不需要写出的取值范围)
(3)如图,在()的条件下,点在第四象限内,连接,,且,点在的延长线上,连接,过点作交线段于点,连接、,将射线绕点逆时针旋转,交线段于点,若,点的横坐标为,求的值.
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