Question

 Tìm min,max của x^2+x+1/x^2+1 . Mong các bạn viết rõ dấu. Cần gấp ạ.

 

Answer 1

x+2x−2−1x=2x(x−2)" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; font-size:18.08px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml">x+2x−2−1x=2x(x−2)

x(x+2)x(x−2)−x−2x(x−2)=2x(x−2)" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; font-size:18.08px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml">x(x+2)x(x−2)−x−2x(x−2)=2x(x−2)

$\iff {}^{}+2x-x+2-2=0$

$\iff {}^{}+x=0$

⇔x(x+1)=0⇔[x=−1x=0

Answer 2

Phân số mà các bạn