Using First principal differentiate w.r.t 'x': `x^(2//3)`

Explanation

To differentiate the function \( f(x) = x^{2/3} \) using the first principle of derivatives, we can follow these steps:

### Step-by-Step Solution

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