Question

The matrix $\left[\begin{array}{ccc}2& 5& -7\\ 0& 3& 11\\ 0& 0& 9\end{array}\right]$ is known as

• A. Symmetric matrix
• B. Diagonal matrix
• C. Upper triangular matrix
• D. Skew symmetric matrix

Answer 1

The correct option is C Upper triangular matrix

We know that if all the elements below the diagonal in the matrix are zero, then it is an upper triangular matrix.