两种情况:
1.a=2,则 c=3^(1/2),a^2=2,c^2=3,b^2=1,方程为x^2/4+y^2=1;
2.b=2,则 c^2/a^2=3/4,b^2=4,[a^2-4]/a^2=3/4得a^2=16,方程为
x^2/4+y^2/16=1.
两种情况:
1.a=2,则 c=3^(1/2),a^2=2,c^2=3,b^2=1,方程为x^2/4+y^2=1;
2.b=2,则 c^2/a^2=3/4,b^2=4,[a^2-4]/a^2=3/4得a^2=16,方程为
x^2/4+y^2/16=1.