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February 6th, 2019, 01:29 AM   #1
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Exclamation Range of function

For which value of a does the interval [0,1/3] completely include the range of the function:
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February 6th, 2019, 12:25 PM   #2
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It is easier to analyze by $3x^4-8ax^3+12a^2+x^2+a \ge3$
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