Write the set {x : x i s a positive integer and `x^2< 40`}in the roster form.

Explanation

To write the set {x : x is a positive integer and x² < 40} in roster form, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Condition**: We need to find positive integers (x) such that the square of x is less than 40. This means we are looking for values of x where \( x^2 < 40 \).

2. **Identify the Range of x**: We need to determine the maximum value of x such that \( x^2 < 40 \). To find this, we can calculate the square root of 40:
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