Engineering Board Exam Reviewer · Determinants · medium

Evaluate the determinant of bmatrix2&0&1\3&1&2\1&0&3 bmatrix.

1. 5
2. 10
3. -5
4. 15

Answer

A. 5

Solution

Expanding along row 1: 2 vmatrix1&2\0&3 vmatrix-0+1 vmatrix3&1\1&0 vmatrix=2(3)+1(-1)=6-1=5.

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