Find $| B |$ . $B = \left[ \begin{array} { c c }
5 & 0 \
0 & - 4
\end{array} \right]$
A)-19
B)-21
C)-22
D)-20
E)-18

Question

Find $| B |$ .​ $B = \left[ \begin{array} { c c } 
5 & 0 \
0 & - 4
\end{array} \right]$ ​
A)-19
B)-21
C)-22
D)-20
E)-18

Quizplus · Accepted Answer

The only difference between the two given values is in their third block of characters (1b25 and 1b26). The hexadecimal value of 1b26 is greater than that of 1b25, which means the second value (11ea99db_b2f2_1b26_94ac_53aae3d57c58_TB4590_11) is larger. The difference between the two values is just one hexadecimal digit (which represents 16 in decimal), so the answer must be -20.

Find ∣B∣| B |∣B∣ ​ B=[500−4]B = \left[ \begin{array} { c c } 5 & 0 \\0 & - 4\end{array} \right]B=[50​0−4​]

Find $| B |$ $B = \left[ \begin{array} { c c } 5 & 0 \\0 & - 4\end{array} \right]$