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Find Is Singular matrix [[1,1,1],[1,1,1],[1,1,1]]

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Your problem `->` Is Singular matrix [[1,1,1],[1,1,1],[1,1,1]]


A square matrix `A`, such that `|A| = 0`, is called a singular matrix.


`A` = 
`1``1``1`
`1``1``1`
`1``1``1`


`|A|` = 
 `1`  `1`  `1` 
 `1`  `1`  `1` 
 `1`  `1`  `1` 


 =
 `1` × 
 `1`  `1` 
 `1`  `1` 
 `-1` × 
 `1`  `1` 
 `1`  `1` 
 `+1` × 
 `1`  `1` 
 `1`  `1` 


`=1 xx (1 × 1 - 1 × 1) -1 xx (1 × 1 - 1 × 1) +1 xx (1 × 1 - 1 × 1)`

`=1 xx (1 -1) -1 xx (1 -1) +1 xx (1 -1)`

`=1 xx (0) -1 xx (0) +1 xx (0)`

`= 0 +0 +0`

`=0`


Here, `|A| = 0`, so `A` is a singular matrix






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