Calculate the determinant of H = [[3, 2], [1, 4]]. (2021)

Practice Questions

Q1
Calculate the determinant of H = [[3, 2], [1, 4]]. (2021)
  1. 10
  2. 11
  3. 12
  4. 13

Questions & Step-by-Step Solutions

Calculate the determinant of H = [[3, 2], [1, 4]]. (2021)
  • Step 1: Identify the matrix H, which is [[3, 2], [1, 4]].
  • Step 2: Write down the formula for the determinant of a 2x2 matrix: det(H) = (a*d) - (b*c), where H = [[a, b], [c, d]].
  • Step 3: Assign the values from the matrix to the variables: a = 3, b = 2, c = 1, d = 4.
  • Step 4: Substitute the values into the formula: det(H) = (3*4) - (2*1).
  • Step 5: Calculate the first part: 3*4 = 12.
  • Step 6: Calculate the second part: 2*1 = 2.
  • Step 7: Subtract the second part from the first part: 12 - 2 = 10.
  • Step 8: Conclude that the determinant of H is 10.
  • Determinant of a 2x2 Matrix – The determinant of a 2x2 matrix [[a, b], [c, d]] is calculated using the formula ad - bc.
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