class 12 maths matrices

If A, B are symmetric matrices of same order, then AB$-$BA is a

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📘 Matrices NCERT,Ex.3.3,Q.No.11,Page.90 SA

If A, B are symmetric matrices of same order, then AB$-$BA is a

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.:

Option a is correct

We know that, $A = A, B’ = B$

So, (AB - $BA)’ = (AB)’ - (BA)’$

= B’A’$-$A’B’ = BA$-$AB=$-$(AB$-$BA)

$\therefore$ AB$-$BA is a skew$-$symmetric matrix.

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