Question

What do you understand by minor and cofactor of square matrix ? Explain with example .​

Answer 1

The determinant obtained by deleting the row and column in which that element lies are called Minor of an element .

The co-factor is defined as the signed minor.

Step-by-step explanation:

The determinant obtained by deleting the row and column in which that element lies are called Minor of an element .

e.g. in the determinant $D=\left|\begin{array}{lll}a_{11} & a_{12} & a_{13} \\a_{21} & a_{22} & a_{23} \\a_{31} & a_{32} & a_{33}\end{array}\right|$

Minor of $a_{11}$ is denoted by  $M_{11}$ =$\left|\begin{array}{ll}a_{22} & a_{23} \\a_{32} & a_{33}\end{array}\right|$

Co-factor of a Determinant

The co-factor is defined as the signed minor. Co-factor of an element $a_{ij}$, denoted by $A_{ij}$ is defined by $A= (-1)^{i+j }$M, where M is minor of $a_{ij}$.

To learn more

1)What is the minor and cofactor

https://brainly.in/question/3290593

2) Find Minors and Cofactors of the elements of determinant​

https://brainly.in/question/14443778

Answer 2

Answer:

Step-by-step explanation: