In Exercises 79, find the absolute extrema of the function on the closed interval. Use a graphing utility to verify your results.
To calculate: The absolute extreme on a closed interval
Given Information:
The provided function on the open interval,
Formula used:
To find the absolute extreme of
Step 1: Find the derivative of
Step 2: Find the critical values in the open interval.
Step 3: Calculate
Step 4: Evaluate the function at each endpoint.
Step 5: For critical number
Calculation:
Consider the provided function on the open interval,
The critical points for the functions is determined by taking derivative of the function,
Equate
Here
Hence, the critical point in the given interval is
Use all the information to form the table as;
End point 
Critical point 
End point 

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