椭圆x的平方/8+y的平方/9=1a^2=9,b^2=8,c^2=1焦点坐标是(0,1),(0,-1)设双曲线方程是y^2/a^2-x^2/b^2=1.c^2=a^2+b^2=1渐近线y=a/b x=根号3 x即:a=b根号3解得:b^2=1/4,a^2=3/4即双曲线方程是:y^2/(3/4)-x^2/(1/4)=1...