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Find Is Symmetric matrix [[1,2,3],[2,5,6],[3,6,9]]

Solution:
Your problem `->` Is Symmetric matrix [[1,2,3],[2,5,6],[3,6,9]]


A square matrix `A=[a_(ij)]` is said to be a symmetric if `A = A^T` i.e. `a_(ij) = a_(ji)` for all i,j.


`A` = 
`1``2``3`
`2``5``6`
`3``6``9`


`A^T` = 
`1``2``3`
`2``5``6`
`3``6``9`
T
 = 
`1``2``3`
`2``5``6`
`3``6``9`



Here, `A` and `A^T` are equal, so `A` is a symmetric matrix






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