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Let A and B be 2xx2 matrices with real e...

Let A and B be `2xx2` matrices with real entries . Let I be the `2xx2` indentity matrix. Denote by tr (A) the sum of diagonal entries of A .
Statement -1 : AB -BA `ne` I
Statement -2 : tr (A+B ) = tr (A) +tr (B) and tr (AB) =tr (BA)

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MCGROW HILL PUBLICATION-MATRICES-Questions from Previous Years. B -Architecture Entrance Examination Papers
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  17. The value of a for which the system linear of equations x+ay+z=1 a...

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