设椭圆方程:x²/a²+y²/b²=1∵焦点坐标为(2,0)(-2,0)∴c=2e=c/a=2/a右准线:x=a²/c=a²/2P(5/2,-3/2)点P到右准线的距离*e=点P到焦点的距离:∴√[(5/2-2)²+(-3/2-0)²]*e=a²...