Find the adjoint matrix of the matrix given below:A =
1
3
2
-5
Find the adjoint matrix of the matrix given below:
A =
1
3
2
-5
1
3
2
-5
Solution
A₁₁ = -5A₁₂ = -3A₂₁ = -2A₂₂ = 1
The matrix of cofactors of A is CA =
-5
-2
-3
1
As we know, "Adjoint of a matrix = transpose of its Cofactor Matrix."
∴ Adjoint of matrix A =
-5
-3
-2
1
The matrix of cofactors of A is CA =
-5
-2
-3
1
As we know, "Adjoint of a matrix = transpose of its Cofactor Matrix."
∴ Adjoint of matrix A =
-5
-3
-2
1
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