Question: 20 / / 2 Let As B two digonal matrices prove that the following matrices are diagonal: a ) At B b ) A -

20 / / 2 Let As B two digonal matrices prove

20 / / 2 Let As B two digonal matrices prove that the following matrices are diagonal: a ) At B b ) A - B , C ) KA, KER 1 A = prove that - 2 A - A - 6 I = 0

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