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71

Step-by-step Answer
PAGE: 185SET: ExercisesPROBLEM: 71
Please look in your text book for this problem Statement

The function has  a critical number at .

Conditions are  and .

Use first derivative test to identify relative extrema.

 changes from negative to  positive at .

Therefore according to first derivative test , the function has minimum at . 

The function has minimum at .



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