Question

Cho 2 số x,y khác 0 thỏa mãn :

\(x^2 + \frac{8}{x^2} + \frac{y^2}{8} = 8\)

Tìm GTNN của P = xy +2019

Answer 1

1=2018x+2019y≥(2018+2019)2x+y⇒x+y≥(2018+2019)2" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; 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-spacing:normal" class="MathJax_CHTML mjx-chtml">1=2018x+2019y≥(2018+2019)2x+y⇒x+y≥(2018+2019)2

xy=20182019" role="presentation" style="border:0px; direction:ltr; display:inline-block; float:none; font-size:16.38px; 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-spacing:normal" class="MathJax_CHTML mjx-chtml">xy=√20182019