Mathematics
Senior High
【次のような楕円の方程式を求めよ】
①焦点が（2√5、0）（ｰ2√5、0）で
長軸と短軸の長さの差が４。
②中心が原点、長軸がＹ軸上、
短軸の長さが４、
点（√３、２）を通る。
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