设椭圆标准方程为：x²/a² + y²/b²=1(a>b>0)点(-1,4√5/5)代入得:1/a²+16/(5b²)=1 ①∵一条准线为x=5∴a²/c=5,a²=5c ②b²=a²-c²=5c-c² ③②③均代入①:...