Аналитическая геометрия и линейная алгебра. Умнов А.Е. - 64 стр.

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                                                                      →     →    →
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                                                                x1        x2         x3
                                                           →         →          →
                                                           r1 = y1 ; r2 = y 2 ; r3 = y 3 
                                                                z1        z2         z3

                                                                                                                             →   →       →     →
cËËÓÒË             jÏ ‚°ãºmÒ« ÏÈÈÒ °ãË‚ˈ ˆº ÓË}ºããÒÓËȯөË mË}ˆº¯© r2 − r1  Ò r3 − r1 
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                            z
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                                                                      →     →    →
    ~ÈÈÈ              Æ xqxznun rvvélqtjz {O, g1 , g 2 , g 3 }  xvxzjkqz yéjktntqn wsvxrvxzq
    
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                                             →
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                                         nz

                                                                                                                         →
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                               →     → →
                       ˆË ( r − r0 , n ) = 0 
                 
                                                                                                     →       →   →
                       {vézvtvéuqévkjttvp°Ò°ˆËäË}ºº¯ÒÓȈ {O, e1 , e2 , e3 } ªˆº‚°ãºmÒ˹¯Ò
                       ÓÒäÈˈmÒ
                 

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