For which value(s) of is equal to zero?

Answer and explanation

Correct answer: B. Only

  1. Step 1: Expand along the first row: . Step 2. This is , which vanishes only at . **Answer: Only . Why not the others:** The alternative values fail to make the determinant zero when evaluated via cofactor expansion along the matrix rows.

Practise more Calculus, Algebra, Geometry and Probability.

Free questions with an explanation for every one, and full timed Selectividad / EvAU (Spain) mock tests.

All Calculus, Algebra, Geometry and Probability questionsTake a mock test

More Calculus, Algebra, Geometry and Probability questions