HSC Commerce 12th Board ExamMaharashtra State Board
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Solution for Find Cofactors of the Elements of the Matrix a = [ − 1 2 − 3 4 ] - HSC Commerce 12th Board Exam - Mathematics and Statistics

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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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