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CHAPTER 7. ANALYTIC GEOMETRY
629. kçêã~ä=cçêã=
β
β
ñ Åçë + ó ëáå − é = M =
=
=
=
Figure 104.
=
630. mçáåí=aáêÉÅíáçå=cçêã=
ñ − ñ N = ó − ó N I==
u v
ïÜÉêÉ= ( v =áë=íÜÉ=ÇáêÉÅíáçå=çÑ=íÜÉ=äáåÉ=~åÇ= ( I ó )=äáÉë=
ñ
m
) I u
N N N
çå=íÜÉ=äáåÉK=
=
143
