双曲线以椭圆x/9+y/25=1的焦点为焦点,它的离心率是椭圆离心率的2倍求双曲线的方程
双曲线以椭圆x/9+y/25=1的焦点为焦点,它的离心率是椭圆离心率的2倍求双曲线的方程
数学人气:104 ℃时间:2019-11-04 11:11:45
优质解答
x的平方/25-y的平方/39=1
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