如圖所示，A(m，m)和B(n，－n)兩點分別在*線OS，OT上移動，且·＝－，O為座標原點，動點P滿足＝＋....
問題詳情：如圖所示，A(m，m)和B(n，－n)兩點分別在*線OS，OT上移動，且·＝－，O為座標原點，動點P滿足＝＋.(1)求mn的值；(2)求動點P的軌跡方程，並説明它表示什麼曲線？【回答】解(1)由·＝(m，m)·(n，－n)＝－2mn.得－2mn＝－，∴mn＝.(2)設P(x，y)(x>0)，由＝＋，得(x，y)＝(m，m)＋(n，－n)＝(...
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