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What is the output of the following MATLAB code?

medium📝 Predict Output Q13 of 15
MATLAB - Linear Algebra

What is the output of the following MATLAB code?

A = [2 3; 1 4];
d = det(A);
d
A-5
B11
C10
D5
Step-by-Step Solution
Solution:
  1. Step 1: Calculate determinant of matrix A

    Matrix A = [2 3; 1 4]. Determinant = (2*4) - (3*1) = 8 - 3 = 5.
  2. Step 2: Assign and display determinant

    Variable d stores 5, so output is 5.
  3. Final Answer:

    5 -> Option D
  4. Quick Check:

    det([2 3;1 4]) = 5 [OK]
Quick Trick: Use formula ad-bc for 2x2 matrix determinant [OK]
Common Mistakes:
  • Multiplying elements incorrectly
  • Swapping terms in subtraction
  • Confusing determinant with sum

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