截距式设l为x/a+y/b=1,即bx+ay-ab=0
d=(/ab/)/√ (a^2+b^2)=
=(/ab/)/c
= √3c/4
所以16a^2*b^2=3c^4
将b^2换为c^2-a^2
16a^4-16a^2c^2+3c^4=0
16e^4-16e^2+3=0
解出e=2或√(4/3)
截距式设l为x/a+y/b=1,即bx+ay-ab=0
d=(/ab/)/√ (a^2+b^2)=
=(/ab/)/c
= √3c/4
所以16a^2*b^2=3c^4
将b^2换为c^2-a^2
16a^4-16a^2c^2+3c^4=0
16e^4-16e^2+3=0
解出e=2或√(4/3)