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If S=[S(i j)] is a scalar matrix such th...

If `S=[S_(i j)]` is a scalar matrix such that `s_(i i)=ka n dA` is a square matrix of the same order, then `A S=S A=?` `A^k` (b) `k+A` (c) `k A` (d) `k S`

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Given:`S=[S_(i j)]` is a scalar matrix such that `s_(i i)=k` and `A` is a square matrix of the same order
As `S=k(I)`
So
`AS=AkI`
`=kAI`
`=kA`
...
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