Write the elements a23 of a 3x3 matrix A =(aij) whose elements aij are given by aij=| i-j|/2

Question

Write the element \( a_{23} \) of a \( 3 \times 3 \) matrix \( A=\left(a_{i j}\right) \) whose elements \( a_{i j} \) are given by \( a_{1 j}=\frac{|i-j|}{2} \).

Answer 1

\(a_{ij} = \frac{|i - j|}{2}\)

\(a_{23} = \frac{|2 - 3|}{2} = \frac12\)