(1)如图1,求的值;
(2)如图2,点在第二象限的抛物线上,连接交轴于点,连接,设点的横坐标为的面积为,求与的函数关系式;(不要求写出自变量的取值范围)
(3)如图3,在(2)的条件下,点是第一象限内,直线上方任意一点,点在线段上,连接,线段与线段交于点,过点作交抛物线于点,若,时,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