CBSE Class 12 Math 2019 All India Set 1 Solved Paper

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Question : 24
Total: 29
If A=[
111
013
121
]
, find A1.
Hence, solve the following system of equations :
x+y+z=6
y+3z=11
and x2y+z=0
OR
Find the inverse of the following matrix, using elementary transformations :
A=[
231
241
372
]
Solution:  
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