Find the Inverse, If It Exists, for the Matrix $\left[ \begin{array} { l l l } 1 & 1 & 1 \\ 2 & 1 & 1 \\ 2 & 2 & 3 \end{array} \right]$

question 237

Multiple Choice

Find the inverse, if it exists, for the matrix.
- $\left[ \begin{array} { l l l } 1 & 1 & 1 \\ 2 & 1 & 1 \\ 2 & 2 & 3 \end{array} \right]$

• A) The inverse does not exist.
• B) \[\left[ \begin{array} { r r r }
• - 1 & 1 & 0 \\
• 4 & - 1 & - 1 \\
• - 2 & 0 & 1
• \end{array} \right]\]
• C)
• \[\left[ \begin{array} { l l l }
• - 1 & - 1 & - 1 \\
• - 2 & - 1 & - 1 \\
• - 2 & - 2 & - 3
• \end{array} \right]\]
• D)
• \[\left[ \begin{array} { c c c }
• 1 & 1 & 1 \\
• \frac { 1 } { 2 } & 1 & 1 \\
• \frac { 1 } { 2 } & \frac { 1 } { 2 } & \frac { 1 } { 3 }
• \end{array} \right]\]

---

Definitions:

Confidence Interval

A compilation of values, taken from samples' statistics, likely embracing the value of an enigmatic population parameter.

Unpopped Kernels

The hard, unexploded seeds of corn that remain after attempting to pop corn, typically found at the bottom of the popcorn maker or container after cooking.

Microwave Popcorn

A type of popcorn that's designed to be cooked in a microwave oven, often packaged in a paper bag with kernel, oil, and flavorings.

Reduced-Fat Cookies

Cookies formulated with lower amounts of fat compared to their traditional counterparts.