What is the value of the determinant ?

Answer and explanation

Correct answer: B. 26

  1. Step 1: For a matrix, the determinant equals the product of the diagonal elements minus the product of the off-diagonal elements: .
  2. Step 2: With the given values, write .
  3. Step 3: Calculating the difference yields .
Answer
26.
Why not the others: -26 reverses the sign (); -38 adds the diagonal products () instead of subtracting; -16 adds rather than subtracts the constant term in the final step.

Practise more Matrices and determinants.

Free questions with an explanation for every one, and full timed JEE Main mock tests.

All Matrices and determinants questionsTake a mock test

More Matrices and determinants questions