Аналитическая геометрия и линейная алгебра. Умнов А.Е. - 115 стр.

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                      x   x∗  β1                                                                                       x
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                      y   y   β2                                                                                       y
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                       y = (α 21 x 0 + α 22 y 0 + β2 ) + (α 21 p + α 22 q )τ             q = α 21 p + α 22 q
          
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