To find: The derivative of the function at .
The derivative of the function at is .
The derivative of a function f at a number a, denoted by is,
Obtain the derivative of the function at .
Rewrite the function as follows.
Use the equation (1) to compute .
Perform the mathematical operations to simplify the numerator,
Since the limit h approaches zero but not equal to zero, cancel the common term h from both the numerator and the denominator,
Thus, the derivative of the function at is .
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