Let a = a + bi and = c + di be complex scalars and let

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Let a = a + bi and β = c + di be complex scalars and let A and B be matrices with
complex entries.
(a) Show that
a+B=a + B and aß = a B

(b) Show that the (i. j) entries of AB- and A-B- arc equal and hence that
A-B- = A-B-

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