Page 181 - 1300 Math Formulas
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CHAPTER 7. ANALYTIC GEOMETRY
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Figure 132.
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683. aáÜÉÇê~ä=^åÖäÉ=_ÉíïÉÉå=qïç=mä~åÉë=
fÑ=íÜÉ=éä~åÉë=~êÉ=ÖáîÉå=Äó==
^ N ñ + _ N ó + ` N ò + a = MI==
N
^ O ñ + _ O ó + ` O ò + a = M I==
O
íÜÉå=íÜÉ=ÇáÜÉÇê~ä=~åÖäÉ=ÄÉíïÉÉå=íÜÉã=áë==
r
r
Åçë =ϕ r å N å ⋅ r O = ^ N ^ + _ N _ + ` N ` O K=
O
O
å ⋅ å O ^ + _ + ` ⋅ ^ + _ + ` O O
O
O
O
O
O
N
N
O
N
O
N
=
171
