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प्रश्न
Show that the matrix A = `[(1,-1,5),(-1,2,1),(5,1,3)]` is a symmetric matrix.
उत्तर
Given, A `= [(1,-1,5),(-1,2,1),(5,1,3)]`
So, A' `= [(1,-1,5),(-1,2,1),(5,1,3)]`
∵ A' = A Hence, it is proved that the matrices are
`"A" = [(1,-1,5),(-1,2,1),(5,1,3)]` is a symmetric matrix.
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