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"Let \\( \\left( D _ { 1 } , D _ { 1 } D _ { 1 } , D _ { 2 } \\right) \\) he the sef all third order determinants that can be formed with the distinct\nnon-zero real numbers \\( a _ { 1 } , a _ { 1 } , \\ldots , a _ { 1 } \\) then\n\\( \\begin{array} { l l l l } { \\text { 1) } \\sum _ { i = 1 } ^ { k } q _ { i } = 1 } & { \\text { 2) } \\sum _ { i = 1 } ^ { 2 } D _ { i } = 0 } & { \\text { 3) } D _ { i } = D _ { 1 } \\text { for all i. } j \\text { . None } } & { } \\end{array} \\)"

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