Find the critical numbers of the rational polynomial `(x^2+1)/(x^2-x-6)`.

Explanation

To find the critical numbers of the rational polynomial \( f(x) = \frac{x^2 + 1}{x^2 - x - 6} \), we will follow these steps:

### Step 1: Identify the function and its components
We have:
- Numerator \( f(x) = x^2 + 1 \)
- Denominator \( g(x) = x^2 - x - 6 \)

### Step 2: Find the derivative using the Quotient Rule
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