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4. Let A be an n x n matrix. Define the trace of A by the formula tr(A) = 2 . In other words, the trace of a matrix is the su
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Based on the properties of the trace of the matrix. the solutions are explained in the images attached below.

The trace os the matrix is nothing but thes um of the doagonal elements.

Screenshots:

4) a) 3 (CIC 343 Criver AB are 33 matrices (bu bor big B-l be br 623 C. as 23 ) I bi 532 3335 AEB. (antbr ₂, +bz, laz, abs, a

c) AB-BA I properties of Trace, AB - I + BA we know that by the | F(AZ) (@A) ti (AB), tr(Is) + fr (BA) to (I) = 0 But tr (Iz)

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