Determine whether the software you are using includes a computer algebra system (CAS), and...

Determine whether the software you are using includes a computer algebra system (CAS), and if it does, do the following:

(a) Find the command for entering a symbolic matrix. (This command may be different than that for entering a numeric matrix.)

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(b) Enter several symbolic matrices like

Compute expressions like A + B, 2A, 3A + B, A –2B, AT + BT, etc. (In some systems you must explicitly indicate scalar multiplication with an asterisk.)