JEE Main · MathematicsEasy

$What is the value of the determinant of the matrix (2134) ?$

A. $5$
B. $11$
C. $8$
D. $7$

Show correct answer & step-by-step solution

Correct answer: A — $5$

Solution

The determinant of a 2 \times 2 matrix (a c b d) is calculated as a d - b c . Here, (2 \times 4) - (3 \times 1) = 8 - 3 = 5 .

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