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Let $x$ and $y$ be real numbers. If $x^2 + 3y^2 = 18$, then find the maximum value of $x + y$.

 Feb 2, 2025
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x2+3y2=183y2=18x2y=6x23x=183y2x+y=183y2+6x23

 

laugh !

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 Feb 3, 2025

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