Find the derivative of `f(x) =1/x`

Explanation

To find the derivative of the function \( f(x) = \frac{1}{x} \) using the first principles of derivatives, we will follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Derivative**:
The derivative of a function \( f(x) \) at a point \( x \) is defined as:
\[
f'(x) = \lim_{h \to 0} \frac{f(x+h) - f(x)}{h}
...