(1)求直线的解析式;
(2)如图1,点是线段上一点,点是线段上一点,,连接、,设点的纵坐标为,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,在(2)的条件下,,点在线段上,连接,,点在线段上,连接、,将沿着直线折叠得到,交线段于点,若的面积等于的面积的,为锐角,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