Decide Whether or Not the Matrices Are Inverses of Each $\left[ \begin{array} { r r } - 2 & 4 \\ 4 & - 4 \end{array} \right]$

question 23

Multiple Choice

Decide whether or not the matrices are inverses of each other.
- $\left[ \begin{array} { r r } - 2 & 4 \\ 4 & - 4 \end{array} \right]$ and $\left[ \begin{array} { c c } \frac { 1 } { 2 } & \frac { 1 } { 4 } \\ \frac { 1 } { 2 } & \frac { 1 } { 4 } \end{array} \right]$

• A) Yes
• B) No

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Definitions:

Longitudinal Study

A research method in which data is collected from the same subjects repeatedly over a period of time, often many years.

Optimistic Explanatory Style

Refers to a manner of explaining life events in a positive light, attributing good outcomes to personal abilities and bad outcomes to external factors.

Pessimistic Explanatory Style

The inclination to ascribe adverse occurrences to constant, inherent, and widespread factors.

Type A Personality

A personality type characterized by high levels of competitiveness, self-drive, impatience, and a constant sense of urgency.