Give the mathematical expression of Boyle.s law.

Explanation

### Step-by-Step Solution for Boyle's Law

1. **Understanding Boyle's Law**: Boyle's Law states that the pressure of a given mass of gas is inversely proportional to its volume when the temperature is held constant. This means that if the pressure increases, the volume decreases, and vice versa.

2. **Mathematical Representation**: The mathematical expression for Boyle's Law can be expressed as:
\[ P \propto \frac{1}{V} \]
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