y=(-2/3)x=+-(b/a)x
所以2/3=b/a
b=2a/3
b^2=4a^2/9
a^2/c=2
a^2/[根(a^2+b^2)]=2
3a/(根13)=2
a=(2/3)根13
a^2=52/9
b=(4/9)根13
b^2=208/9
双曲线方程为
9x^2/52-9y^2/208=1
y=(-2/3)x=+-(b/a)x
所以2/3=b/a
b=2a/3
b^2=4a^2/9
a^2/c=2
a^2/[根(a^2+b^2)]=2
3a/(根13)=2
a=(2/3)根13
a^2=52/9
b=(4/9)根13
b^2=208/9
双曲线方程为
9x^2/52-9y^2/208=1