mn giải hpt này giúp mk vs ạ!!~\(\hept{\begin{cases}^{x^3+y^3=8}\\x+y+2xy=2\end{cases}}\)
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Đặt \(0\le a=\frac{x}{x^2+1}\le\frac{x}{2x}=\frac{1}{2}\)
\(\Rightarrow0\le a\le\frac{1}{2}\)
ta có \(P=2a^2+a=a\left(2a+1\right)\ge0\Rightarrow GTNN=0\) khi \(a\left(2a+1\right)=0\Leftrightarrow\frac{x}{x^2+1}=0\Leftrightarrow x=0\)
mà \(0\le a\le\frac{1}{2}\Rightarrow a^2\le\frac{1}{4}\Rightarrow P=2a^2+a\le\frac{2.1}{4}+\frac{1}{2}=1\Rightarrow GTLN=1\)
khi \(a=\frac{1}{2}\Leftrightarrow\frac{x}{x^2+1}=\frac{1}{2}\Leftrightarrow x=1\)
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Choose the word with the different pronunciation of the underlined part.
1- A. Some B.how C. other D. come
2- A. parent B. afternoon C. class D. father
A-Choose the word with the different pronunciation of the underlined part.
1-A. Some B.how C. other D. come
2-A. parent B. afternoon C. class D. father
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