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Matrices and Determinants question

2021 · 26 Feb · Shift 1 · Q25
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  5. /2021 · 26 Feb · Shift 1 · Q25

Matrices and Determinants question

2021 · 26 Feb · Shift 1 · Q25

JEE MainMathematicsMatrices and DeterminantsMCQ+4 / −1
Let A be a symmetric matrix of order 2 with integer entries. If the sum of the diagonal elements of A2 is 1, then the possible number of such matrices is :
  1. A
    6
  2. B
    4
  3. C
    1
  4. D
    12
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