Given $A = \left[ \begin{array} { c c c } 2 & 3 & - 1 \\4 & - 2 & 0 \\- 3 & - 5 & 2\end{array} \right]$

question 83

Multiple Choice

Given $A = \left[ \begin{array} { c c c } 2 & 3 & - 1 \\4 & - 2 & 0 \\- 3 & - 5 & 2\end{array} \right]$ and $B = \left[ \begin{array} { c c c } 3 & 5 & - 3 \\5 & 2 & 2 \\- 7 & 4 & 2\end{array} \right]$
, find $3 A - 2 B$

• A) \(\left[ \begin{array} { c c c }
• 2 & 1 & 3 \\
• 2 & 10 & - 4 \\
• 5 & 3 & 2
• \end{array} \right]\)
• B) \(\left[ \begin{array} { c c c }
• 1 & 1 & 3 \\
• 3 & 10 & - 4 \\
• 4 & 23 & 5
• \end{array} \right]\)
• C) \(\left[ \begin{array} { c c c }
• 0 & - 1 & 3 \\
• 2 & - 10 & 4 \\
• 5 & - 23 & 2
• \end{array} \right]\)
• D) \(\left[ \begin{array} { c c c }
• 2 & - 1 & - 3 \\
• 0 & 10 & 4 \\
• 5 & - 14 & - 2
• \end{array} \right]\)
• E) none

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Definitions:

Herfindahl-Hirschman Index

A measure of market concentration to assess the level of competition within an industry.

Herfindahl-Hirschman Index

A measure of market concentration, calculated by summing the squares of the market shares of all firms in the industry.

Industry A

Placeholder for a specific sector of the economy, often used as an example in economic contexts.

Barriers to Entry

Economic, procedural, or market-based factors that obstruct or restrict the ability of new competitors to enter an industry.