—              ?

—It makes me very sad.

如图，P₁是反比例函数y=$\frac{k}{x}$（k＞0）在第一象限图象上一点，点A₁的坐标为（1，0）．

（1）当点P₁的横坐标逐渐增大时，△P₁OA₁的面积将如何变化？

（2）若△P₁OA₁与△P₂A₁A₂均为直角三角形，其中∠P₁OA₁=P₂A₁A₂=60°，求此反比例函数的解析式及点A₂的坐标．

    Susan is 14 years old and she is an American girl. She is one of my best friends. She is interested in Chinese and good at it. Every summer she travels with her parents. She believes（相信） that traveling is an important part in her life. She likes London best because it is both clean and beautiful. She knows that China is a large country with lots of interesting places. This July, her family are coming to China. I am very happy to know that they will first come to my city. They will stay here for three days. I will take them to visit the city. Then they will fly to Beijing. I am sure they will have a nice time in China.