Nguyễn Huy Tú ( ✎﹏IDΣΛ亗 )
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2022-08-24 10:31:05
\(5.5\sqrt{a^2}-25a=25\left|a\right|-25a=-25a-25a=-50a\)
2022-08-24 10:28:59
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2022-08-21 14:50:13
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2022-08-21 14:50:04
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2022-08-21 14:49:57
2022-08-21 01:15:56
\(A=\left|x-2022\right|+\left|2023-x\right|\ge\left|x-2022+2023-x\right|=1\)
Dấu ''='' xảy ra khi \(2022\le x\le2023\)
2022-08-21 01:14:21
\(-\left(x^2-\dfrac{2.3}{2}x+\dfrac{9}{4}-\dfrac{9}{4}\right)+7=-\left(x-\dfrac{3}{2}\right)^2+\dfrac{37}{4}\le\dfrac{37}{4}\)
Dấu ''='' xảy ra khi x = 3/2
2022-08-21 01:12:48
\(\sqrt{98};\sqrt{80};\sqrt{54};\sqrt{97};\sqrt{99}\)
\(\Rightarrow6\sqrt{3};4\sqrt{5};\sqrt{97};7\sqrt{2};3\sqrt{11}\)
2022-08-21 01:10:39
\(\Rightarrow x+6=24\Leftrightarrow x=18\)
2022-08-21 01:09:42
\(D=\dfrac{5\left(3x-1\right)\left(6x+1\right)}{\left(3x-1\right)^2}=\dfrac{5\left(18x^2-3x-1\right)}{9x^2-6x+1}=\dfrac{90x^2-15x-5}{9x^2-6x+1}\)
