(1)求出A,B,C三点的坐标;
(2)已知点Q是线段上的动点,过点Q作交抛物线的第四象限部分于点P,连接,,如图①,记与的面积分别为,,设,当S最大时,求点P的坐标;
(3)将抛物线平移得到抛物线,其顶点为原点,如图②,直线与抛物线交于O,G两点,过的中点作直线(异于直线)交抛物线于M,N两点,直线与直线交于点P.问点P是否在一条定直线上?若是,求该直线的解析式;若不是,请说明理由.
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