( ) D , ..
D = ai1Ai1 + ai2Ai2 ++ainAin
D = a1jA1j + a2jA2j ++anjAnj.
i- j- .
5. D = : ) 1- ; ) 2- . . ) D = 3(-1)1+1 + 1(-1)1+2 + 2(-1)1+3 = 3(4 (-20)) (-2 0) +2(4-0) = 72 + 2 + 8 =82. ) D = 1 (-1)1+2 + 2 (-1)2+2 + (- 4) (-1)3+2 = -(-2 0) + 2(6 0) +4(15 (-2)) = 2 + 12 + 68 = 82. |
, , .
6. D = . . 1- ( ): D = 3 - 0 + 2 - 0 . , D = 3 + 2 = = 3 + 2 = 3 (-6 - 2 +16) +2 (-72 + 33)= = 24 78 = - 54. |
:
1. , . , .
2. .
3. . , 7 .
, , 6, - ( ) ( ) , .