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CHAPTER 7.  ANALYTIC GEOMETRY




















                                                                               =
                                    =
                                                         Figure 96.
                                    =
                              620.  `çåîÉêíáåÖ=oÉÅí~åÖìä~ê=`ççêÇáå~íÉë=íç=mçä~ê=`ççêÇáå~íÉë=
                                    ñ  = Åçë ϕ I= = ëáåêó  ϕK=
                                        ê
                                    =




















                                                                                   =
                                    =
                                                         Figure 97.
                                    =
                              621.  `çåîÉêíáåÖ=mçä~ê=`ççêÇáå~íÉë=íç=oÉÅí~åÖìä~ê=`ççêÇáå~íÉë=
                                                         ó
                                    ê =  ñ +  ó I=í~å =    K=
                                                     ϕ
                                           O
                                               O
                                                         ñ

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