4+x²+y²/2≤xy+y 求x+y

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4+x²+y²/2≤xy+y求x+y4+x²+y²/2≤xy+y求x+y4+x²+y²/2≤xy+y求x+y是4+x²+(y

4+x²+y²/2≤xy+y 求x+y
4+x²+y²/2≤xy+y 求x+y

4+x²+y²/2≤xy+y 求x+y
是4+x²+(y²/2)≤xy+y吗?