CBSE Class 12 Math 2019 Delhi Set 2 Solved Paper

Question : 9

Total: 9

If A=[

2	−3	5
3	2	−4
1	1	−2

], then find A−1. Hence solve the following system of equations :
2x−3y+5z=11,3x+2y−4z=−5,x+y−2z=−3.
OR
Obtain the inverse of the following matrix using elementary operations :
A=[

−1	1	2
1	2	3
3	1	1

]

Solution:

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