CBSE Class 12 Math 2019 Delhi Set 2 Solved Paper

Question : 9 of 9

Marks: +1, -0

A={[\table 2 , -3 , 5 ; 3 , 2 , -4 ; 1 , 1 , -2]}

, then find

A^{-1}

. Hence solve the following system of equations :

2 x-3 y+5 z=11,3 x+2 y-4 z=-5, x+y-2 z=-3 .

OR
Obtain the inverse of the following matrix using elementary operations :

A={[\table -1 , 1 , 2 ; 1 , 2 , 3 ; 3 , 1 , 1 ]}

Solution:

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