渐近线方程为y=4/3x或y=-4/3x,又过A(4,-10),画图可得焦点在Y轴上.
设b=3k,a=4k.
那么方程是:y^2/(4k)^2-x^2/(3k)^2=1
(4,-10)代入得:100/16k^2-16/9k^2=1
k^2=161/36
那么方程是:y^2/161-x^2/(161/4)=1
渐近线方程为y=4/3x或y=-4/3x,又过A(4,-10),画图可得焦点在Y轴上.
设b=3k,a=4k.
那么方程是:y^2/(4k)^2-x^2/(3k)^2=1
(4,-10)代入得:100/16k^2-16/9k^2=1
k^2=161/36
那么方程是:y^2/161-x^2/(161/4)=1