Quantitative Analysis for Management, 13/e

Self-Test

• Before taking the self-test, refer back to the learning objectives at the beginning of the module and the glossary at the end of the module.

• Use the key at the back of the book to correct your answers.

• Restudy pages that correspond to any questions that you answered incorrectly or material you feel uncertain about.

1. The value of the determinant $\left|\begin{array}{cc}1& 2\\ 3& 4\end{array}\right|$ is

   1. 2.

   2. 10.

   3. $-2.$

   4. $-5.$

   5. 14.

2. To add two matrices,

   1. the first matrix must have the same number of rows and columns as the second matrix.

   2. the number of rows in the second matrix must equal the number of columns in the first matrix.

   3. the number of columns in the second matrix must equal the number of rows in the first matrix.

   4. both matrices must be square matrices.

3. In a $2\times 2$ matrix, the determinant ...