[12+28]+...........=-6
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a: \(A=\left(x+2+2x-5\right)^2=\left(3x-3\right)^2\)
\(=\left(\dfrac{3}{4}-3\right)^2=\left(-\dfrac{9}{4}\right)^2=\dfrac{81}{16}\)
Ta có: \(\left(x^{3n}+y^{3n}\right)\left(x^{3n}-y^{3n}\right)=-x^6-y^6\)
\(\Leftrightarrow x^{6n}-y^{6n}=-x^6-y^6\)
\(\Leftrightarrow\left\{{}\begin{matrix}n=-1\\n=1\end{matrix}\right.\Leftrightarrow n\in\varnothing\)
\(c,\overline{735a2b}⋮̸2;⋮5\Rightarrow b=5\\ \Rightarrow\overline{735a25}⋮9\\ \Rightarrow7+3+5+a+2+5⋮9\\ \Rightarrow22+a⋮9\\ \Rightarrow a=5\\ \Rightarrow\overline{735a2b}=735525\\ b,\overline{5a27b}⋮2;⋮5\Rightarrow b=0\\ \Rightarrow\overline{5a270}⋮9\\ \Rightarrow5+a+2+7+0⋮9\\ \Rightarrow14+a⋮9\\ \Rightarrow a=4\\ \Rightarrow\overline{5a27b}=54270\)
My favourite folk tale names Cinderella. There is Cinderella who is the main character, her two step-sisters and stepmother who are the villains. It's about a beautiful girl by the name of Cinderella lived with her wicked stepmother and step-sisters. She had a really unlucky life unless she met the Prince and they had fallen in love each other. Finally, they had a successful marriage and lived happily ever after. The theme of the story "Cinderella" is that kindness will be rewarded, whereas selfishness will not. The reason why i like this folk tale most it because it gave me a meaningful lesson and it's also romantic, because of the love story of Cinderella and the Prince.
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-46
#hok_tot#
Gọi số cần tìm là x
Theo bài ra, ta có:
\(\left[12+28\right]+x=-6\)
\(\Leftrightarrow40+x=-6\)
\(\Leftrightarrow x=\left(-6\right)-40\)
\(\Leftrightarrow x=-46\)
Vậy số cần tìm là -46
Soc Tong