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Mathematics · JEE | MATRICES

हिन्दी

What is the sum of the diagonal elements of the matrix \( A = \begin{bmatrix} 1 & -3 & 1 \\ 2 & 4 & -1 \\ 3 & 5 & 6 \end{bmatrix} \)?

  1. A
    11
  2. B
    10
  3. C
    12
  4. D
    9
View Answer & Solution

Correct answer · Option B

10

Explanation

The elements of the diagonal of \( A \) are \( 1, 4, 6 \). Their sum is \( 1 + 4 + 6 = 11 \).

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