\(\left|x+1,1\right|+\left|x+1,2\right|+\left|x+1,3\right|+\left|x+1,4\right|=5x\)

Vì GTTĐ luôn lớn hơn hoặc bằng 0 với mọi x 

\(\Rightarrow\left|x+1,1\right|+...+\left|x+1,4\right|\ge0\forall x\)

\(\Rightarrow5x\ge0\forall x\)

\(\Rightarrow x\ge0\)

\(\Leftrightarrow x+1,1+x+1,2+x+1,3+x+1,4=5x\)

\(\Leftrightarrow4x+5=5x\)

\(\Leftrightarrow5x-4x=5\)

\(\Rightarrow x=5\)

Vậy x = 5

vì các giá trị tuyệt đối lớn hơn hoặc bằng 0=>5x  lớn hơn hoặc bằng 0

=>x lớn hơn hoặc bằng 0

=>ta có thể phá dấu giá trj tuyệt đối

ta có x+1.1+x+1.2+x+1.3+x+1.4=5x

5=5x-4x=x

=>x=5

(x+1)+(x+2)+(x+3)+(x+4)=5x

x.(1+2+3+4)=5x

x.5=5x

=>x chỉ có thể là 0 hoặc 1

Nha!!!!!!!!!!!

5x-2x=6-7x

( 1.1 x 1.2 x 1.3 x 1.4 x 1.5 x 1.6 ) x ( 1.25 - 0.25 x 5 ) 

=( 1,1 x 1,2 x1,3 x1,4 x1,5 x1,6 ) x ( 1,25 - 1,25 )

=( 1.1x1,2 x1,3 x1,4 x1,5 x1,6 ) x 0

=0 

khum bít

:)

1 plays

2 drink

3 opens

4 closes

5 causes

6 live

7 know

8 take

9 finish

10 get up

1. Ann…plays…………..handball very well.

2. I never…drink…………..coffee.

3. The swimming pool………opens……..at 7.00 in the morning.

4. It……closes………..at 9.00 in the evening.

5. Bad driving…causes…………..many accidents

6. My parents…live…………..in a very small flat.

7. My students……speak………..a little English.

8. The Olympic Games…take…………..place every four years.

9. They are good students. They always……do………..their homework.

10. I always……wake up………..early in the morning.

1. Ann…plays....handball very well.

2. I never…drink.......coffee.

3. The swimming pool…open…..at 7.00 in the morning.

4. It....closes…at 9.00 in the evening.

5. Bad driving…causes….many accidents

6. My parents…live….in a very small flat.

7. My students……speak…a little English.

8. The Olympic Games…take…...place every four year

9. They are good students. They always……do…their homework.

10. I always……wake up……early in the morning.

Đề này khó hiểu quá

    1.            Unscramble these sentences

       1.1.         If / will / company / I / on / in / the / early / up / I / morning, / time. / to / go / get / my

If I get up early in the morning, I will go to my company on time

       1.2.         he’ll / free / Should / have / he / tennis / play / time,

Should he have free time, he'll play tennis

       1.3.         a / one. / get / you / If / you / need / I / can / ticket,

If you need a ticket, I can get you one

       1.4.         might / may/ / jogs / Henry / he / If / regularly, / weight. / lose

If Henry jogs regularly, he might lose weight

       1.5.         the / we’ll / hurry, / we / catch / If / bus

If we hurry, we'll catch the bus

       1.6.         has / if / Peggy / go / she / in / time / afternoon. / the / shopping / will

If Peggy has time, she will go shopping in the afternoon

       1.7.         watch / be / You / scary / this / will / sleep / to / not / film. / able / you / if

If you watch this scary film, you will not be able to sleep

       1.8.         grass / If / rains, / get / the / will / wet / it

If it rains, the grass will get wet

       1.9.         eat / am / I / get / hungry, / something / to / If / I / will

If I am hungry, I will get something to eat

    1.10.        we / tomorrow / will / today, / home / a / having / party / be / go / If / we

If we go home today, we will be having a party tomorrow

 1.            Write down the sentence using the given words

              1.1.        It rained and you got wet.

              1.2.        They would pass the exam if they worked harder

              1.3.        You have not lied to me so much so I believe in you.

              1.4.        I forgot my phone so I could not call my friends.

              1.5.        She broke her arm when she played badminton with her brother.

              1.6.        You have drank so much that I will take you home.

              1.7.        They heard the news when they stayed at home.

              1.8.        Power did not go out so I watched movies all night.

              1.9.        I went to sleep early but I still overslept.

          1.10.        He learned how to dance but he was embarrassed at the party.

Chúc em ngủ ngon và có những trải nghiệm bổ ích tại Hoc24.vn nhé!

1.        Give the correct form of the following verbs

          1.1.        If I (have)......had....... a typewriter, I could type it myself

          1.2.        You could make much progress if you (attend).....attended... class regularly

          1.3.        If I (know)...knew...... his telephone number, I would give it to you

          1.4.        If you were kind to me, I (be).....would be.. good to you

          1.5.        He (come).....would come......... if you waited

          1.6.        If he (study)....studied.... harder, he could pass the exam

          1.7.        She might be late if she (not hurry).......doesn't hurry.

          1.8.        If a volcano (erupt)....erupted... in the middle of the city, we would be dead

          1.9.        If it (not rain)..did not rain....... a lot, the crop wouldn’t grow

       1.10.        They would not be paid unless they (do)...did....... their work well

  Give the correct form of the following verbs

          1.1.        If I (have)......had....... a typewriter, I could type it myself

          1.2.        You could make much progress if you (attend).....attended... class regularly

          1.3.        If I (know)...knew...... his telephone number, I would give it to you

          1.4.        If you were kind to me, I (be).....would be.. good to you

          1.5.        He (come).....would come......... if you waited

          1.6.        If he (study)....studied.... harder, he could pass the exam

          1.7.        She might be late if she (not hurry).......doesn't hurry.

          1.8.        If a volcano (erupt)....erupted... in the middle of the city, we would be dead

          1.9.        If it (not rain)..did not rain....... a lot, the crop wouldn’t grow

       1.10.        They would not be paid unless they (do)...did....... their work well

Đọc tiếp

1.            Put the verb in the correct tense

       1.1.         If I ……study….(study), I ……will pass…….(pass) the exams.

       1.2.         If the sun ...shines…….(shine), we ……will walk…….(walk) into town.

       1.3.         If he …has…….(have) a temperature, he …will see……….(see) the doctor.

       1.4.         If my friends ……come…….(come), I ……will be…….(be) very happy.

       1.5.         If she ……earns…….(earn) a lot of money, she ……will fly…….(fly) to New York.

       1.6.         If we ……travel…….(travel) to Hanoi, we …will visit……….(visit) the museums.

       1.7.         If you ……wear…….(wear) sandals in the mountains, you ……will slip…….(slip) on the rocks.

       1.8.         If she ……forgets…….(forget) her homework, the teacher ……will give…….(give) her a low mark.

       1.9.         If they ……go…….(go) to the disco, they ……will listen…….(listen) to loud music.

    1.10.        If you …wait……….(wait) a minute, I …will ask……….(ask) my parents.

     1.            Put the verb in the correct tense

       1.1.         If I ………study….(study), I ……will pass…….(pass) the exams.

       1.2.         If the sun ……shines…….(shine), we ……will walk…….(walk) into town.

       1.3.         If he ………….(have) a temperature, he ………….(see) the doctor.

       1.4.         If my friends ……come…….(come), I ………will be….(be) very happy.

       1.5.         If she ……earns…….(earn) a lot of money, she ……will fly…….(fly) to New York.

       1.6.         If we ……travel…….(travel) to Hanoi, we ……will visit…….(visit) the museums.

       1.7.         If you ……wear…….(wear) sandals in the mountains, you ……will slip…….(slip) on the rocks.

       1.8.         If she ……forgets…….(forget) her homework, the teacher ……will give…….(give) her a low mark.

       1.9.         If they ………go….(go) to the disco, they ……will listen…….(listen) to loud music.

    1.10.        If you ……wait…….(wait) a minute, I ……will ask…….(ask) my parents.

236,5

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247,5