Given that A = beginpmatrix3&2&1\4&2&−1endpmatrix and B = beginpmatrix1&4\0&1\3&2endpmatrix
AT = beginpmatrix3&4\2&2\1&−1endpmatrix
Find AT + B = beginpmatrix3&4\2&2\1&−1endpmatrix + beginpmatrix1&4\0&1\3&2endpmatrix = beginpmatrix4&8\2&3\4&1endpmatrix