Class XII ISC Maths Chapter Matrices Exercise 3.5

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class 12 matrices exercise3-1

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Matrices  
Find the inverse of the following (1 to 3) matrices, if they exist, by using elementary operation

Q1(i)
2 3
5 7


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Q1(ii)
1 3
2 7


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Q1(iii)
3 10
2 7


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Q2(i)
1 -1
2 3


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Q2(ii)
3 -1
-4 2


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Q2(iii)
10 -2
-5 1


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Q3(i)
3 0 -1
2 3 0
0 4 1


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Q3(ii)
1 2 3
2 5 7
-2 -4 -5


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Q3(iii)
2 -1 4
4 0 2
3 -2 7


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Q4 Using elementary row operations, find the inverse of the following matrix:
A=
2 -1 3
-5 3 1
-3 2 3


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