The Matrix Is in Reduced Echelon Form

question 3

True/False

The matrix is in reduced echelon form. $$\left. \left[ \begin{array} { l l l } 1 & 1 & 0 \\0 & 1& 2\\0 &0 & 1\end{array} \right] \quad \begin{array} { r} -4 \\7 \\-1\end{array} \right]$$

---

Definitions:

Operant Conditioning

A conditioning method in which the vigor of a response is influenced through the use of encouragements or sanctions.

Obsessive-Compulsive Disorder

A mental disorder characterized by unwanted and intrusive thoughts (obsessions) leading to repetitive behaviors (compulsions) as an attempt to reduce anxiety.

Anxiety Reduction

A process or intervention aimed at decreasing levels of stress or anxiety, often involving techniques such as relaxation exercises, mindfulness, or therapy.

Major Depressive Disorder

A psychological condition marked by a continuously low mood or lack of enjoyment in tasks, which significantly disrupts everyday life.