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CHAPTER 7. ANALYTIC GEOMETRY
670. aáëí~åÅÉ=_ÉíïÉÉå=qïç=mçáåíë=
Ç = (^_ = O N )ñ − O + (ñ O N )ó − O + ( ó O ò N ) ò − O =
=
=== =
=
Figure 123.
=
671. aáîáÇáåÖ=~=iáåÉ=pÉÖãÉåí=áå=íÜÉ=o~íáç=λ =
ñ + λñ ó + λó ò + λò
ñ M = N O I= ó M = N O I=ò M = N O I==
N + λ N + λ N + λ
ïÜÉêÉ=
λ = ^` I= ≠λ − NK=
`_
=
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