📐 Mathematics · Determinants · JEE

The order of the determinant [[1,2,3],[4,5,6],[7,8,9]] is:

Answer: 3.

Correct answer: A. 3

Explanation: It has three rows and three columns, so it is a determinant of order 3.

Concept context

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