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P. 162
CHAPTER 7. ANALYTIC GEOMETRY
a + b − Q ^c
O
O
o = K
O ^
=
=
=
7.5 Ellipse
=
pÉãáã~àçê=~ñáëW=~=
pÉãáãáåçê=~ñáëW=Ä=
cçÅáW= ( c − M I ) Å I= ( M )=
c
I
Å
N
O
aáëí~åÅÉ=ÄÉíïÉÉå=íÜÉ=ÑçÅáW=OÅ= =
bÅÅÉåíêáÅáíóW=É==
oÉ~ä=åìãÄÉêëW=^I=_I=`I=aI=bI=cI=í=
mÉêáãÉíÉêW=i=
^êÉ~W=p=
=
=
645. bèì~íáçå=çÑ=~å=bääáéëÉ=Epí~åÇ~êÇ=cçêãF
ñ O + ó O = N
~ O Ä O
=
=
Figure 115.
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