Аналитическая геометрия и линейная алгебра. Умнов А.Е. - 44 стр.

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                                                                                                                   ,c          ⊥c                  ⊥c
                                                                                                               2
                                                                            →      Λ                 Λ        →               Λ                    Λ       →
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                                                                                             2                                           2
                                                                                        →                      →
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                                                                                         c                     c
                                         = (   2.4.2.) = |c |([ a ,             →        ] +[ b ,      →        ]) = [ a , c ] + [ b , c ]                   .
                                                                                        |c |                |c |
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