Let $x, y$ be positive real numbers. Find the minimum of $$x^2 + xy +\frac{y^2}{2}+\frac{2^6}{x + y}+\frac{3^4}{x^3}$$
Problem
Source: 2014 Saudi Arabia Pre-TST 3.2
Tags: algebra, min, inequalities
sqing
17.09.2020 04:53
parmenides51 wrote: Let $x, y$ be positive real numbers. Find the minimum of $$x^2 + xy +\frac{y^2}{2}+\frac{2^6}{x + y}+\frac{3^4}{x^3}$$
Attachments:

parmenides51
04.01.2022 23:15
solved also here
sqing
05.01.2022 11:33
Let $x, y$ be positive real numbers. Prove that $$ x^2 + xy +\frac{y^2}{2}+\frac{64}{x + y}+\frac{27}{x^2}\geq 3(8+\sqrt 6)$$
sqing
08.01.2022 13:29
sqing wrote: Let $x, y$ be positive real numbers. Prove that $$ x^2 + xy +\frac{y^2}{2}+\frac{64}{x + y}+\frac{27}{x^2}\geq 3(8+\sqrt 6)$$
Attachments:
