1.

Which of the following matrice is invertible? [[1,0,0],[1,1,1],[2,-1,1]]

Answer»

SOLUTION :LET A=`[[1,0,0],[1,1,1],[2,-1,1]]`
`therefore absA= [[1,0,0],[1,1,1],[2,-1,1]]`
=`1[[1,1],[-1,1]]=1+1=2 ne 0`
`therefore` A is INVERTIBLE.


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