: 3×3 Matrix Determinant 8 4 3 -5 6 -2 _7 9. -8 Find the determinant of the matrix using the formulas in number 1
: 3×3 Matrix Determinant
8
4
3
-5
6 -2
_7
9.
-8
Find the determinant of the matrix using the
formulas in number 1 then check your answer
with shortcut solution in number 2:
For nz2.
det(A) = ay Cy = aCj + ayC, ++ anjCnl (for j = 1,2,3, .or n)
det(A) =
a, Cy =aGa +a,Ga ++a,Cm (for i= 1,2,3,-,or n)
Cy= co – factor of a
1.
13
A21
a31
a22
23
a22
A =a21
a31
a32
33]
d32
2.
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