Let $A = \left[ \begin{array} { c c c } 1 & \frac { 1 } { 3 } & 0 \\- 1 & 4 & - \frac { 1 } { 2 }\end{array} \right]$

question 75

Multiple Choice

Let $A = \left[ \begin{array} { c c c } 1 & \frac { 1 } { 3 } & 0 \\- 1 & 4 & - \frac { 1 } { 2 }\end{array} \right]$ and $B = \left[ \begin{array} { c c c } 2 & \frac { 1 } { 2 } & - 1 \\5 & - 6 & \frac { 2 } { 3 }\end{array} \right]$ . Evaluate $A + B$ .

• A) \(\left[ \begin{array} { c c c }
• 4 & - 2 & \frac { 1 } { 6 } \\
• 3 & \frac { 5 } { 6 } & - 1
• \end{array} \right]\)
• B) \(\left[ \begin{array} { c c c }
• 3 & \frac { 5 } { 6 } & - 1 \\
• 4 & - 2 & \frac { 1 } { 6 }
• \end{array} \right]\)
• C) \(\left[ \begin{array} { c c c }
• 2 & \frac { 5 } { 3 } & - 1 \\
• 4 & - 2 & \frac { 1 } { 3 }
• \end{array} \right]\)
• D) \(\left[ \begin{array} { c c c }
• - 1 & - \frac { 1 } { 6 } & 1 \\
• - 6 & 10 & - \frac { 7 } { 6 }
• \end{array} \right]\)
• E) \(\left[ \begin{array} { c c c }
• 2 & \frac { 5 } { 6 } & - 1 \\
• 4 & - 2 & \frac { 1 } { 6 }
• \end{array} \right]\)

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Definitions:

Conservation

The principle in cognitive development that certain properties of an object, such as volume or mass, remain the same despite changes in its form or arrangement.

Centration

A cognitive limitation in early childhood where a child focuses on one aspect of a situation or object, neglecting other relevant aspects.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or touched.

Preoperational Stage

A phase in Piaget's theory of cognitive development (ages 2-7) where children begin to engage in symbolic play but lack the ability to perform operations or use logic.