Determinant e2×2-Diagonal Method Main Diagonal← a11 a12 =a11a22-a12a21 Secondary Diag a21 d22 Tongji University】 4/32
Determinant 2 × 2—Diagonal Method . a11. a12. a21. a22. . . . = a11a22 . Main Diagonal −a12a21 . Secondary Diag (Tongji University) Linear Algebra 4 / 32
Determinant e2×2-Diagonal Method Main Diagonal← a11 a12 =a11a22-a12a21 Secondary Diag a21 d22 Tongji University】 4/32
Determinant 2 × 2—Diagonal Method . a11. a12. a21. a22. . . . = a11a22 . Main Diagonal −a12a21 . Secondary Diag (Tongji University) Linear Algebra 4 / 32
Determinant e2×2-Diagonal Method Main Diagonal← a11 a12 =a11a22-a12a21 Secondary Diag a21 d22 Tongji University】 4/32
Determinant 2 × 2—Diagonal Method . a11. a12. a21. a22. . . . = a11a22 . Main Diagonal −a12a21 . Secondary Diag (Tongji University) Linear Algebra 4 / 32
●3×3 determinants(Diagonal Method) a11 a12 a13 d21 d22 123 a31 a32 a33 D=211d年og1 2 (Tongji University) 5/32
3 × 3 determinants(Diagonal Method) . a11. a12. a13. a21. a22. a23. a31. a32. a33. . . . D =a11a22a33 . +a12a23a31 . +a13a21a32 . −a11a23a32 . −a12a21a33 . −a13a22a31 (Tongji University) Linear Algebra 5 / 32
3 x 3 determinants(Diagonal Method) a11a12 413 d21 a22 a23 a31 a32 a33 D=a11a22a33 g1十 (Tongji University) 5132
3 × 3 determinants(Diagonal Method) . a11. a12. a13. a21. a22. a23. a31. a32. a33. . . . D =a11a22a33 . +a12a23a31 . +a13a21a32 . −a11a23a32 . −a12a21a33 . −a13a22a31 (Tongji University) Linear Algebra 5 / 32