Give the expression to find out the displacement of a particle in nth second.

Explanation

To find the expression for the displacement of a particle in the nth second, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept**:
The displacement of a particle in the nth second can be calculated by finding the difference in displacement between the end of the nth second and the end of the (n-1)th second.

2. **Define the Displacement**:
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