(1)求该二次函数的表达式;
(2)求证:四边形ACHD是正方形;
(3)如图2,点M(t,p)是该二次函数图象上的动点,并且点M在第二象限内,过点M的直线交二次函数的图象于另一点N.
①若四边形ADCM的面积为S,请求出S关于t的函数表达式,并写出t的取值范围;
②若△CMN的面积等于,请求出此时①中S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