If $A=\begin{bmatrix}1 & 2\\4& 2

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Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Linear Programming

Question:

If $A=\begin{bmatrix}1 & 2\\4& 2\end{bmatrix},$ then the value of K for hich $|2A|=K|A|$ is :

Options:

-24

-4

-6

Correct Answer:

Explanation:

The correct answer is option (3) → 4

$|2A|=K|A|$

as order of $A=2$

so $|2A|=2^2|A|$

so $k=2^2=4$