Construct a `2xx3` matrix whose elements are given by
`a_(ij)=(1)/(2)(i-2j)^(2).`

Explanation

To construct a \(2 \times 3\) matrix whose elements are given by the formula \(a_{ij} = \frac{1}{2}(i - 2j)^2\), we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Dimensions**:
The matrix is \(2 \times 3\), meaning it has 2 rows and 3 columns.

2. **Identify the Elements**:
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