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Error Identification. 1.\(\dfrac{\text{Jean}}{ }\) cloth \(\dfrac{was}{ }\) made \(\dfrac{\text{complete}}{ }\) \(\dfrac{\text{from}}{ }\) cotton. 2.\(\dfrac{\text{Would}}{ }\) you like \(\dfrac{\text{come}}{ }\) and \(\dfrac{\text{visit}}{ }\) me \(\dfrac{\text{next}}{ }\) summer? 3.Ao Dai \(\dfrac{\text{was}}{ }\) \(\dfrac{\text{frequently}}{ }\) worn by both \(\dfrac{\text{man}}{ }\) and \(\dfrac{\text{women}}{ }\). 4.\(\dfrac{\text{Wearing uniforms}}{ }\) \(\dfrac{\text{help}}{ }\)...
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Error Identification.

1.\(\dfrac{\text{Jean}}{ }\) cloth \(\dfrac{was}{ }\) made \(\dfrac{\text{complete}}{ }\) \(\dfrac{\text{from}}{ }\) cotton.

2.\(\dfrac{\text{Would}}{ }\) you like \(\dfrac{\text{come}}{ }\) and \(\dfrac{\text{visit}}{ }\) me \(\dfrac{\text{next}}{ }\) summer?

3.Ao Dai \(\dfrac{\text{was}}{ }\) \(\dfrac{\text{frequently}}{ }\) worn by both \(\dfrac{\text{man}}{ }\) and \(\dfrac{\text{women}}{ }\).

4.\(\dfrac{\text{Wearing uniforms}}{ }\) \(\dfrac{\text{help}}{ }\) students \(\dfrac{\text{feel}}{ }\) equal in many \(\dfrac{\text{ways}}{ }\).

5.\(\dfrac{\text{Wearing}}{ }\) uniforms \(\dfrac{\text{encourages}}{ }\) students \(\dfrac{\text{to be}}{ }\) proud \(\dfrac{\text{about}}{ }\) their school.

6.She \(\dfrac{\text{wishes}}{ }\) she \(\dfrac{\text{can}}{ }\) speak English as \(\dfrac{\text{well}}{ }\) \(\dfrac{\text{as}}{ }\) her teacher.

7.I seldom \(\dfrac{\text{go}}{ }\) to \(\dfrac{\text{a}}{ }\) football match.I'm not very \(\dfrac{\text{interesting}}{ }\) \(\dfrac{\text{in}}{ }\) football.

8.A \(\dfrac{\text{new}}{ }\) style of jeans \(\dfrac{\text{have}}{ }\) just been \(\dfrac{\text{introduced}}{ }\) \(\dfrac{\text{in }}{ }\)the USA.

9.\(\dfrac{\text{In}}{ }\) the \(^{18^{th}}\)century, jean cloth \(\dfrac{\text{was}}{ }\) made \(\dfrac{\text{completely}}{ }\) \(\dfrac{\text{by}}{ }\) cotton.

10.Mr.Brown is \(\dfrac{\text{interested}}{ }\) in \(\dfrac{\text{to go shopping}}{ }\) \(\dfrac{\text{every}}{ }\) Sunday.

11.I \(\dfrac{\text{wish}}{ }\) I \(\dfrac{\text{have}}{ }\) a new watch. \(\dfrac{\text{Mine}}{ }\) is \(\dfrac{\text{too }}{ }\)old.

12.Emma \(\dfrac{\text{used to}}{ }\) lie \(\dfrac{\text{on}}{ }\) the beach when she \(\dfrac{\text{lives}}{ }\) \(\dfrac{\text{by the sea}}{ }\).

13.\(\dfrac{\text{Wearing}}{ }\) uniforms \(\dfrac{\text{encourage}}{ }\) the students \(\dfrac{\text{to be}}{ }\) proud of \(\dfrac{\text{their}}{ }\) schools.

14.How \(\dfrac{\text{long}}{ }\) \(\dfrac{\text{have}}{ }\) you \(\dfrac{\text{learning}}{ }\) \(\dfrac{\text{English}}{ }\)?

15.Ao dai \(\dfrac{\text{was}}{ }\) \(\dfrac{\text{frequent}}{ }\) \(\dfrac{\text{worn }}{ }\)by \(\dfrac{\text{both men and women}}{ }\).

2
25 tháng 7 2018

Error Identification.

1.JeanJean cloth waswas made completecomplete=>completely fromfrom cotton.

2.WouldWould you like comecome=>to come and visitvisit me nextnext summer?

3.Ao Dai waswas frequentlyfrequently worn by both manman=>men and womenwomen.

4.Wearing uniformsWearing uniforms helphelp=>helps students feelfeel equal in many waysways.

5.WearingWearing uniforms encouragesencourages students to be to be proud aboutabout =>of their school.

6.She wisheswishes she cancan =>could speak English as wellwell asas her teacher.

7.I seldom gogo to aa football match.I'm not very interestinginteresting=>interested inin football.

8.A newnew style of jeans havehave=>has just been introducedintroduced in in the USA.

9.InIn the 18th18thcentury, jean cloth waswas made completelycompletely byby=>from cotton.

10.Mr.Brown is interestedinterested in to go shopping to go shopping=>going shopping everyevery Sunday.

11.I wishwish I havehave=>had a new watch. MineMine is too too old.

12.Emma used toused to lie onon the beach when she liveslives=>lived by the seaby the sea.

13.WearingWearing uniforms encourageencourage=>encourages the students to beto be proud of theirtheir schools.

14.How longlong havehave you learninglearning=>learnt EnglishEnglish?

15.Ao dai waswas frequentfrequent=>frequently worn worn by both men and womenboth men and women.

25 tháng 7 2018

Error Identification.

1.Jean cloth was made complete=>completely from cotton.

2.Would you like come=>to come and visit me next summer?

3.Ao Dai was frequently worn by both man=>men and women.

4.Wearing uniforms help=>helps students feel equal in many ways.

5.Wearing uniforms encourages students to be proud about =>of their school.

6.She wishes she can =>could speak English as well as her teacher.

7.I seldom go to a football match.I'm not very interesting=>interested in football.

8.A new style of jeans have=>has just been introduced in the USA.

9.In the 18th century, jean cloth was made completely by=>from cotton.

10.Mr.Brown is interested in to go shopping=>going shopping every Sunday.

11.I wish I have=>had a new watch. Mine is too old.

12.Emma used to lie on the beach when she lives=>lived by the sea.

13.Wearing uniforms encourage=>encourages the students to be proud of their schools.

14.How long have you learning=>learnt English?

15.Ao dai was frequent=>frequently worn by both men and women.

24 tháng 6 2021

`a)1/7xx2/7+1/7xx5/7+6/7`

`=1/7xx(2/7+5/7)+6/7`

`=1/7xx1+6/7`

`=1/7+6/7=1`

`b)6/11xx4/9+6/11xx7/9-6/11xx2/9`

`=6/11xx(4/9+7/9-2/9)`

`=6/11xx9/9`

`=6/11`

24 tháng 6 2021

Sorry nãy ghi thiếu.

`c)4/25xx5/8xx25/4xx24`

`=(4xx5xx25xx24)/(25xx8xx4)`

`=(4xx5xx24)/(4xx8)`

`=(5xx24)/8`

`=5xx3=15`

26 tháng 10 2021

\(=\dfrac{2}{3}+\dfrac{1}{5}-\dfrac{2}{3}-4\)

\(=\dfrac{1}{5}-4=\dfrac{-19}{5}\)

23 tháng 10 2021

d: Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:

\(\dfrac{x}{\dfrac{1}{2}}=\dfrac{y}{\dfrac{1}{3}}=\dfrac{z}{\dfrac{1}{4}}=\dfrac{x+3y-2z}{\dfrac{1}{2}+3\cdot\dfrac{1}{3}-2\cdot\dfrac{1}{4}}=\dfrac{36}{1}=36\)

Do đó: x=18; y=12; z=9

22 tháng 10 2021

d: Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:

\(\dfrac{x}{\dfrac{1}{2}}=\dfrac{y}{\dfrac{1}{3}}=\dfrac{z}{\dfrac{1}{4}}=\dfrac{x+3y-2z}{\dfrac{1}{2}+3\cdot\dfrac{1}{3}-2\cdot\dfrac{1}{4}}=\dfrac{36}{1}=36\)

Do đó: x=18; y=12; z=9

22 tháng 10 2021

a) Thay x + 3y - 2z vào biểu thức ta có:

 \(\dfrac{x - 1}{3} = \dfrac{3(y + 2)}{3 . 4} = \dfrac{2(z - 2)}{2 . 3}\) = \(​​​​\dfrac{x - 1}{3} = \dfrac{3x + 6}{12} = \dfrac{2z - 4}{6}\)

Áp dụng tính chất dãy tỉ số bằng nhua ta có:

\(​​​​\dfrac{x - 1}{3} = \dfrac{3y + 6}{12} = \dfrac{2z - 4}{6} = ​​​​\dfrac{x - 1}{3}+ \dfrac{3y + 6}{12} -\dfrac{2z - 4}{6}\) 

=\(​​​​\dfrac{x - 1 + 3y + 6 - 2z + 4}{3 + 12 -6} \) = \(​​​​\dfrac{(x + 3y - 2z) + ( -1 + 6 +4)}{3 + 12 - 6} \)

=\(​​​​\dfrac{36 + 9}{9}\) = 5

=> \(​​​​\dfrac{x - 1}{3} =\) 5 => x - 1 = 5.3 =15 => x = 5+1 = 6

=>

=>

Vậy ...

(Bạn dựa theo cách này và lm những bài tiếp nhé!)

 

 

 

 

 

6 tháng 3 2022

cái jz nè .-. 

6 tháng 3 2022

oho

a: VT=sin^2a(sin^2a+cos^2a)+cos^2a

=sin^2a+cos^2a

=1=VP

b: \(VT=\dfrac{sina+sina\cdot cosa+sina-sina\cdot cosa}{1-cos^2a}=\dfrac{2sina}{sin^2a}=\dfrac{2}{sina}=VP\)

c: \(VT=\dfrac{sin^2a+1+2cosa+cos^2a}{sina\left(1+cosa\right)}\)

\(=\dfrac{2\left(cosa+1\right)}{sina\left(1+cosa\right)}=\dfrac{2}{sina}=VP\)

15 tháng 3 2023

đặt

\(A=\dfrac{1}{2\cdot5}+\dfrac{1}{5\cdot8}+\dfrac{1}{8\cdot11}+..+\dfrac{1}{92\cdot95}+\dfrac{1}{95\cdot97}\)

\(3A=\dfrac{3}{2\cdot5}+\dfrac{3}{5\cdot8}+\dfrac{3}{8\cdot11}+...+\dfrac{3}{92\cdot95}+\dfrac{3}{95\cdot97}\)

\(3A=\dfrac{1}{2}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{11}+...+\dfrac{1}{92}-\dfrac{1}{95}+\dfrac{1}{95}-\dfrac{1}{97}\)

\(3A=\dfrac{1}{2}-\dfrac{1}{97}\\ 3A=\dfrac{95}{194}\\ A=\dfrac{95}{582}\)

\(\dfrac{4-x}{-5}=\dfrac{-5}{4-x}\)

\(\left(4-x\right)^2=25=5^2=\left(-5\right)^2\)

4-x=5 hoặc 4-x=-5

x=-1 hoặc x=9

12 tháng 5 2021

bn ơi còn các câu còn lại là j ạ ???????????

6 tháng 11

\(\dfrac{11}{24}\) : \(\dfrac{17}{23}\) - \(\dfrac{11}{24}\) : \(\dfrac{17}{11}\) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x \(\dfrac{23}{17}\) - \(\dfrac{11}{24}\) x \(\)\(\dfrac{11}{17}\) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x (\(\dfrac{23}{17}\) + \(\dfrac{11}{17}\)) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x 2 - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{12}\) - \(\dfrac{1}{12}\)

=- \(\dfrac{12}{12}\)

= - 1