📐 Mathematics · Determinants · JEE

The determinant of [[3, 1], [2, 4]] is:

Answer: 10.

Correct answer: A. 10

Explanation: (3)(4) − (1)(2) = 12 − 2 = 10.

Concept context

Evaluation of determinants, cofactors, adjoint, inverse of matrix, Cramer's rule and area applications. Always in board and JEE.