If A=[a(ij)](nxxn) such that a(ij)=0, ...

If `A=[a_(ij)]_(nxxn)` such that `a_(ij)=0`, for `i nej` then , A is …….. `(a_(ij)nea_(jj))(ngt1)`

a column matrix

a row matrix

a diagonal matrix

a scalar matrix.

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