Give first 3 terms of the sequence defined by `a_n=n/(n^2+1)dot`

Explanation

To find the first three terms of the sequence defined by \( a_n = \frac{n}{n^2 + 1} \), we will substitute \( n = 1, 2, \) and \( 3 \) into the formula.

### Step-by-Step Solution:

1. **Calculate the first term \( a_1 \)**:
\[ a_1 = \frac{1}{1^2 + 1} = \frac{1}{1 + 1} = \frac{1}{2} \]
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