(1)求a的值及反比例函数的表达式;
(2)如图1,一次函数的图象与的图象交于E,F两点,点M的横坐标与点E横坐标相同且纵坐标是点E的2倍;点N的横坐标与点F横坐标相同且纵坐标是点F的2倍.连接,,判断和的数量关系,并说明理由;
(3)如图2,点A是反比例函数的图象上一动点,与的图象交于点B,作轴交的图象于点C,作交的图象于点D,连接,,在点A运动过程中,的值是否发生变化?若不变,求出其值;若变化,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