Make \( i \) the subject of the following formula: \[ F=P(1+i n) \]

To make \( i \) the subject of the formula \( F = P(1 + i n) \), we start by isolating the term containing \( i \). 1. Divide both sides by \( P \): \[ \frac{F}{P} = 1 + i n \] 2. Subtract 1 from both sides: \[ \frac{F}{P} - 1 = i n \] 3. Finally, divide both sides by \( n \): \[ i = \frac{\frac{F}{P} - 1}{n} \] So, the final expression for \( i \) is: \[ i = \frac{F/P - 1}{n} \]