Question

What is the trace of matrix A=$\left(\begin{array}{ccc}5& 5& 8\\ 9& 8& 4\\ 7& 2& 3\end{array}\right]$?

• A. 15
• B. 20
• C. 14
• D. 16

Answer 1

The correct option is D 16

The sum of principal diagonal elements of a square matrix is called trace of matrix
here Trace of A=$\to \left(tr\right|=5+8+3=16$