Evaluate the following limit: `underset( x rarr 3) ( "lim")(x^4-81)/(x^2-9)`

Explanation

To evaluate the limit \(\lim_{x \to 3} \frac{x^4 - 81}{x^2 - 9}\), we can follow these steps:

### Step 1: Identify the limit
We start with the limit:
\[ L = \lim_{x \to 3} \frac{x^4 - 81}{x^2 - 9} \]

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