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The solution for August 17th

 
 
ChenVictoria 的头像
The solution for August 17th
ChenVictoria 发表于 2019年08月18日 Sunday 05:20
 

Is the solution wrong? I checked and the numerator does not have root 3. It seems the function does not have any minimum value

 
ProfessorAreteem的头像
Re: The solution for August 17th
ProfessorAreteem 发表于 2019年08月18日 Sunday 11:55
 

Hi Victoria. Thanks for pointing this out! In fact the problem was meant to have $x^3+3x^2-10x - 24$ (with $-24$ instead of $+24$). Then things work out nicely (with the polynomial division having no remainder). The question and solution are now updated.

Please let us know if you have any other questions!