HSC Commerce (Marketing and Salesmanship) 12th Board ExamMaharashtra State Board
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# Find Cofactors of the Elements of the Matrix a = [ − 1 2 − 3 4 ] - HSC Commerce (Marketing and Salesmanship) 12th Board Exam - Mathematics and Statistics

#### Question

Find cofactors of the elements of the matrix A = [[-1,2],[-3,4]]

#### Solution

Cofactors are

A_11=(-1)^1+1(4)=4

A_12= (-1)^1+2(-3)=3

A _21=(-1)^2+1(2)=-2

A_22=(-1)^2+2(-1)=-1

∴ Co-factors matrix [[A_11,A_12],[A_21,A_22]]= [[4,3],[-2,-1]]

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#### APPEARS IN

2017-2018 (March) (with solutions)
Question 1.7 | 2.00 marks
Solution Find Cofactors of the Elements of the Matrix a = [ − 1 2 − 3 4 ] Concept: Introduction of Matrices.
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