If `lim_(x->a)(x^9-a^9)/(x-a)=\ lim_(x->5)(4+x)` find all possible values of `adot`

Explanation

To solve the limit problem, we need to evaluate the expression given in the question step by step.

### Step 1: Set Up the Equation
We start with the equation given in the problem:
\[ \lim_{x \to a} \frac{x^9 - a^9}{x - a} = \lim_{x \to 5} (4 + x) \]

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