F1(-√3,0),F2(√3,0)c=√3a^2-b^2=c^2=3,a^2=3+b^2椭圆过（√3/2,√13/4）x^2/a^2+y^2/b^2=1x^2/(3+b^2)+y^2/b^2=1(√3/2)^2/(3+b^2)+(√13/4)^2/b^2=1b^2=1,a^2=4椭圆方程:x^2/4+y^2=1直线AB:y=kx+2x^2/...