2c=2,c=1 BD^2=AB^2+AD^2=2^2+(3/2)^2=4+9/4=25/4,BD=5/2
BD+AD=2a=5/2+3/2,a=2,b^2=a^2-c^2=3
以AB中点为O(0,0),AB为y轴,D(3/2,1)
所求方程为
y^2/4+x^2/3=1
2c=2,c=1 BD^2=AB^2+AD^2=2^2+(3/2)^2=4+9/4=25/4,BD=5/2
BD+AD=2a=5/2+3/2,a=2,b^2=a^2-c^2=3
以AB中点为O(0,0),AB为y轴,D(3/2,1)
所求方程为
y^2/4+x^2/3=1