(1)求抛物线的解析式;
(2)P为直线上方抛物线上一点,过点P作轴于点H,交于点D,连接、,设的面积为S,点P的横坐标为t,求S与t的函数关系式,并直接写出自变量t的取值范围;
(3)如图在(2)的条件下,在线段上取点M,使,在第一象限的抛物线上取点N,连接、,过点M作交直线于点G,连接,,,求线段的长.
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