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Matrices and Determinants · 2021 · 25 Feb · Shift 2

3 Mathematics questions from this JEE Main paper
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Matrices and Determinants · 2021 · 25 Feb · Shift 2

3 Mathematics questions from this JEE Main paper

  1. Q32.Let A be a 3 × 3 matrix with det(A) = 4. Let Ri denote the ith row of A. If a matrix B is obtained by performing the operation R2 → 2R2 + 5R3 on 2A, then det(B) is equal to :
    Mathematics · Matrices and Determinants · MCQ
  2. Q37.If for the matrix, A=[1α​−αβ​], AAT=I2​, then the value of α4+β4 is :
    Mathematics · Matrices and Determinants · MCQ
  3. Q39.The following system of linear equations 2x + 3y + 2z = 9 3x + 2y + 2z = 9 x − y + 4z = 8
    Mathematics · Matrices and Determinants · MCQ