My family decorates (decorate) the house every Tet. I don't like (not/like) eating too many sweets during Tet. Did you visit (you/visit) your relatives this Tet?

My family ____decorates______ (decorate) the house every Tet. I ____don't like______ (not/like) eating too many sweets during Tet. ______Will you visit____ (you/visit) your relatives this Tet?

2601

\(C=3\cdot\dfrac{1}{1\cdot2}-5\cdot\dfrac{1}{2\cdot3}+7\cdot\dfrac{1}{3\cdot4}-...+15\cdot\dfrac{1}{7\cdot8}-17\cdot\dfrac{1}{8\cdot9}\)

\(=\dfrac{3}{1\cdot2}-\dfrac{5}{2\cdot3}+\dfrac{7}{3\cdot4}-...+\dfrac{15}{7\cdot8}-\dfrac{17}{8\cdot9}\)

\(=1+\dfrac{1}{2}-\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}+\dfrac{1}{4}-...+\dfrac{1}{7}+\dfrac{1}{8}-\dfrac{1}{8}-\dfrac{1}{9}\)

\(=1-\dfrac{1}{9}=\dfrac{8}{9}\)

Em nói rằng:"Mình quá đệp trai". Tác dụng dấu ngoặc kép : dùng để dẫn lời nói trực tiếp của nhân vật hoặc người nào đó.

Ví dụ :

Bà tôi thường nói : ''Có công mài sắt, có ngày nên kim " .

• Dấu ngoặc kép được sử dụng để trích dẫn nguyên văn lời nói của bà tôi.
• Ngoài ra, dấu ngoặc kép cũng có thể dùng để đánh dấu tên tác phẩm, từ ngữ được nhấn mạnh hoặc từ mang ý nghĩa đặc biệt trong văn bản.

"Ra giang hồ" là một cụm từ mang nhiều tầng nghĩa, thường được sử dụng để chỉ việc một người bước ra khỏi vùng an toàn, đối mặt với những thử thách mới, và tham gia vào những hoạt động đầy rẫy bất ngờ và sự cạnh tranh. Ý nghĩa cụ thể của cụm từ này sẽ thay đổi tùy thuộc vào ngữ cảnh sử dụng, có thể từ một cuộc đối đầu trực tiếp, một cuộc phiêu lưu mạo hiểm, hoặc đơn giản chỉ là một sự thay đổi lớn trong cuộc sống.

\(\frac12\) - (\(\frac23\) \(\times\) \(x\) - \(\frac13\)) = \(\frac23\)

\(\frac23\times\) \(x\) - \(\frac13\) = \(\frac12\) - \(\frac23\)

\(\frac23\times\) \(x\) = \(\frac13\) - \(\frac23+\frac12\)

\(\frac23\times\) \(x\) = - \(\frac13\) + \(\frac12\)

\(\frac23\) \(\times\) \(x\) = - \(\frac26+\frac36\)

\(\frac23\times\) \(x\) = \(\frac16\)

\(x=\frac16:\frac23\)

\(x\) = \(\frac14\)

vậy \(x=\frac14\)

\(\dfrac{1}{2}-\left[\dfrac{2}{3}x\cdot\left(-\dfrac{1}{3}\right)\right]=\dfrac{2}{3}\\ \dfrac{2}{3}x\cdot\left(-\dfrac{1}{3}\right)=-\dfrac{1}{6}\\ \dfrac{2}{3}x=\dfrac{1}{2}=>x=\dfrac{3}{4}\)

\(-\dfrac{5}{15}+\dfrac{9}{7}+\dfrac{1}{-3}-\left(-\dfrac{276}{14}\right)\\ =-\dfrac{5}{15}+\dfrac{18}{14}-\dfrac{5}{15}+\dfrac{276}{14}\\ =-\dfrac{10}{15}+\dfrac{294}{14}=-\dfrac{2}{3}+21=\dfrac{61}{3}\)

- \(\frac{5}{15}\) + \(\frac97\) + \(\frac{1}{-3}\) - \(-\frac{276}{14}\)

= (- \(\frac13\) - \(\frac13\)) + (\(\frac97\) + \(\frac{138}{7}\))

= - \(\frac23\) + 21

= - \(\frac23+\frac{63}{3}\)

= \(\frac{61}{3}\)

\(x\cdot\left(2+x\right)\cdot\left(7-x\right)=0\\ =>\left[{}\begin{matrix}x=0\\2+x=0\\7-x=0\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=0\\x=-2\\x=7\end{matrix}\right.\)

vậy phương trình có 3 nghiệm là \(x_1=0;x_2=-2;x_3=7\)

Th 1 : x + 2 = 0 x = 0 - 2 x = -2 Th 2 : x - 7 = 0 x = 0 + 7 x = 7

Tra gg

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\(\dfrac{2x+5}{n-3}=\dfrac{n-3+n-3+11}{n-3}\\ =\dfrac{n-3}{n-3}+\dfrac{n-3}{n-3}+\dfrac{11}{n-3}=1+1+\dfrac{11}{n-3}\)

để phân số này đạt giá trị nguyên thì n - 3 ∈ Ư(11) = {\(\pm1;\pm11\)}

\(n-3=1=>n=4\\ n-3=-1=>n=2\\ n-3=11=>n=14\\ n-3=-11=>n=-8\)

vậy n ∈ {4; 2; 14; -8} thì phân số có giá trị nguyên