Question

八年级数学函数题，求学霸解答，要过程。

Answer 1

(1)
令E(e, 0)
四边形DCOE为平行四边形, 其面积=OE*D的纵坐标 = 4e =4, e = 1
OE = CD = 1, D的横坐标 = C的横坐标+CD = 3 + 1 = 4; D的纵坐标与C相同，均为4, D(4, 4)
代入y = k/x, k = 16

(2)
△CFP与△COA相似, △CDP与△CBA相似, FP/OA = CP/CA = PD/AB
PDCF为菱形, FP=PD, 那么OA = AB, 即OABC也是菱形, OA=OC=AB=5
A(5, 0), B的横坐标=C的横坐标+OA = 3+5 = 8, B,C纵坐标相同, B(8, 4)