Find the Products AB and BA to Determine Whether B $A = \left[ \begin{array} { r r } - 3 & - 1 \\ 2 & - 4 \end{array} \right]$

question 100

Multiple Choice

Find the products AB and BA to determine whether B is the multiplicative inverse of A.
- $A = \left[ \begin{array} { r r } - 3 & - 1 \\ 2 & - 4 \end{array} \right]$

• A) No inverse
• B)
• \(\left[ \begin{array} { l l } 3 & - 1 \\ 2 & - 4 \end{array} \right]\)
• C)
• \(\left[ \begin{array} { r r } - 3 & 1 \\ 2 & - 4 \end{array} \right]\)
• D)
• \(\left[\begin{array}{cc}
• -\frac{1}{3} & -1 \\
• \frac{1}{2} & \frac{1}{4}
• \end{array}\right]\)

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