Write the value of the derivative of `f(x)=|x-1|+|x-3|` at `x=2` .

Explanation

To find the value of the derivative of the function \( f(x) = |x - 1| + |x - 3| \) at \( x = 2 \), we can follow these steps:

### Step 1: Identify the function and the point of interest
The function is \( f(x) = |x - 1| + |x - 3| \), and we need to find \( f'(2) \).

### Step 2: Use the definition of the derivative
The derivative \( f'(x) \) can be calculated using the limit definition:
\[
...