题目

Lying in the sun on a rock, the cougar(美洲狮)saw Jeb and his son, Tom before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar, It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too. Jeb let go of his jacket, grasped Tom and held him across his body, making a cross. Now the cougar’s enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb. “Tom, no” shouted his father. But Tom broke and ran and that’s the 如图是函数与函数在第一象限内的图象，点是的图象上一动点，轴于点A，交的图象于点，轴于点B，交的图象于点．（1）求证：D是BP的中点；（2）求出四边形ODPC的面积．