To calculate inverse matrix you need to do the following steps. Set the matrix (must be square) and append the identity matrix of the same dimension to it. Reduce the left matrix to row
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After you have quit by clicking [2ND] and [MODE], go back into the matrix menu by clicking [2ND] and [ x − 1] (or just the matrix button if you have a TI83). This time, select A from the NAMES menu by clicking [ENTER]. Step 4: Press the Inverse Key [ x − 1] and Press Enter The
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