Question

设椭圆中心在坐标原点,坐标轴为对称轴,一个焦点为F(1,0),椭圆上的点P到

Answer 1

x^2/a^2+y^2/b^2=1,(a>b),c=1,a=1+√3-1=√3,b^2=a^2-c^2=2,

x^2/3+y^2/2=1.

2、5x^2+6mx+3m^2-6=0,

x1+x2=-6m/5,x1*x2=(3m^2-6)/5,

|AB|=√（1+1）[x1+x2)^2-4x1x2]=(√2/5)√(120-24m^2),

故0