(1)b= ;
(2)若点P在第一象限,过点P作PH⊥x轴,垂足为H,PH与BC、BD分别交于点M、N.是否存在这样的点P,使得PM=MN=NH?若存在,求出点P的坐标;若不存在,请说明理由;
(3)若点P的横坐标小于3,过点P作PQ⊥BD,垂足为Q,直线PQ与x轴交于点R,且S△PQB=2S△QRB,求点P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