Decide Whether or Not the Matrices Are Inverses of Each $\left[ \begin{array} { l l } - 5 & 1 \\ - 7 & 1 \end{array} \right]$

question 439

Multiple Choice

Decide whether or not the matrices are inverses of each other.
- $\left[ \begin{array} { l l } - 5 & 1 \\ - 7 & 1 \end{array} \right]$ and $\left[ \begin{array} { c c } \frac { 1 } { 2 } & - \frac { 1 } { 2 } \\ \frac { 7 } { 2 } & - \frac { 5 } { 2 } \end{array} \right]$

• A) Yes
• B) No

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