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определитель можно по формулам:1) ∣∣∣∣a11a21a31a12a22a32a13a23a33∣∣∣∣=a21A21+a22A22+a23A23|a11a12a13a21a22a23a31a32a33|=a21A21+a22A22+a23A23 \begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22}& a_{23} \\ a_{31} & a_{32} & a_{33}\end{vmatrix} = a_{21} A_{21} +a_{22} A_{22} +a_{23} A_{23} 2) ∣∣∣∣a11a21a31a12a22a32a13a23a33∣∣∣∣=a13A13+a23A23+a33A33|a11a12a13a21a22a23a31a32a33|=a13A13+a23A23+a33A33 \begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22}& a_{23} \\ a_{31} & a_{32} & a_{33}\end{vmatrix} = a_{13} A_{13} +a_{23} A_{23} +a_{33} A_{33} 3) ∣∣∣∣a11a21a31a12a22a32a13a23a33∣∣∣∣=a21A12+a22A22+a23A32|a11a12a13a21a22a23a31a32a33|=a21A12+a22A22+a23A32 \begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22}& a_{23} \\ a_{31} & a_{32} & a_{33}\end{vmatrix} = a_{21} A_{12} +a_{22} A_{22} +a_{23} A_{32} 4) ∣∣∣∣a11a21a31a12a22a32a13a23a33∣∣∣∣=a11a22a33+a12a23a31−a13a21a32+a13a22a31−a12a21a33+a11a23a32|a11a12a13a21a22a23a31a32a33|=a11a22a33+a12a23a31−a13a21a32+a13a22a31−a12a21a33+a11a23a32 \begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22}& a_{23} \\ a_{31} & a_{32} & a_{33}\end{vmatrix} = a_{11} a_{22} a_{33} +a_{12} a_{23} a_{31} -a_{13} a_{21} a_{32} +a_{13} a_{22} a_{31} -a_{12} a_{21} a_{33}+a_{11} a_{23} a_{32} 5) ∣∣∣∣a11a21a31a12a22a32a13a23a33∣∣∣∣=a11a22a33+a12a23a31+a13a21a32−a13a22a31−a12a21a33−a11a23a32|a11a12a13a21a22a23a31a32a33|=a11a22a33+a12a23a31+a13a21a32−a13a22a31−a12a21a33−a11a23a32 \begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22}& a_{23} \\ a_{31} & a_{32} & a_{33}\end{vmatrix} = a_{11} a_{22} a_{33} +a_{12} a_{23} a_{31}+a_{13} a_{21} a_{32} -a_{13} a_{22} a_{31} -a_{12} a_{21} a_{33}-a_{11} a_{23} a_{32} Укажите
верные равенства.