Аналитическая геометрия и линейная алгебра. Умнов А.Е. - 202 стр.

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   α n1ξ1 + α n2ξ 2 + ... + α nnξ n = λξ                        α n1ξ1 + α n 2ξ 2 + ... + (α nn − λ )ξ n = 0
             

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