1. _rm_h_ir 3. b_ _ks_el_ 5. _te_eo 7. _to_l 2. t_le_isi_o 4. c_u_h 6. t_le_ho_e 8.l_vi_g r_
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Dịch ra là: Ta có: 3A = 3. (1 + 3 + 32 + 33 + ... + 399 + 3100) (1 + 3 + 32 + 33 + ... + 399 + 3100) 3A = 3 + 32 + 33 + ... + 3100 + 31013 + 32 + 33 + ... + 3100 + 3101 Suy ra: 3A - A = (3 + 32 + 33 + ... + 3100 + 3101) - (1 + 3 + 32 + 33 + ... + 399 + 3100) (3 + 32 + 33 + ... + 3100 + 3101) - (1 + 3 + 32 + 33 + ... + 399 + 3100) ⇒⇒ A = 3101−123101−12 Vậy A = 3101−12
Mà đoạn 2A sai nhé bạn, sửa lại:
2A = 3101−13101−1 2A=-10001
A=-10001/2
A=-5000,5
Vậy A=-5000,5
1, My cousin, Peter (have) has a dog. It (be) is an intelligent pet with a short tail and big black eyes. Its name (be) is Kiki and it () s eating pork. However, it (never/ bite) never bites anyone; sometimes it (bark) barks when strange guests visit. To be honest, it (be) is very friendly. It (not/ ) does not |doesn’t eating fruits, but it (often/ play) often plays with them. When the weather (become) becomes bad, it (just/ sleep) just sleeps in his cage all day. Peter (play) plays with Kiki every day after school. There (be) are many people on the road, so Peter (not/ let) does not let|doesn’t let the dog run into the road. He (often/ take) often takes Kiki to a large field to enjoy the peace there. Kiki (sometimes/ be) is sometimes naughty, but Peter loves it very much.
2,
1. My father works in Vinh City.
2. I go to bed at 10 o'clock.
3. She has breakfast at home.
4. He studies English everyday.
5. We have History on Thursday.
6. She watches her face twice a day.
7. He always wears a white coat.
8. Our school has 3 floors.
9. Mrs.Lien is Nga's mother.
10. Nam's school is in the country.
Mọi người giúp mk nha. Mk cần gấp đến chiều 16/7/2019 là phải dùng r nên mọi ng giúp mk nhé (Đây là bài topic về 1 mạng xã hội bạn thường dùng để liên lạc với gđ và bạn bè).
Thanks mọi người
1. What sport do you ?
- What is your ..favorite sport...........................?
2 . No one in my class is taller than Nam.
- Nam is the ..tallest in my class.............................
3 . What about collecting empty bottles and cans ?
- Let's ...collect empty bottles and cans................................................ ?
4. She s Coca - Copa best.
- Her ....favorite drink is Coca - Copa.................................
1. What is your favourite sport?
2. Nam is the tallest in my class.
3. Let's us collecting empty bottles and cans.
4. Her favourite drink is Coca - Cola
Complete the sentence with the correct form of the verb.
1. Children often use (use) a computer for school work.
2. Is Jane watching (Jane/watch) Tv now?
3. Mark doesn't go (not/go) to school on Friday afternoon.
4. Look! The cat is eating (eat) your breakfast
5. Do you study (you/study) IT at school?
6. I am not listening (not listen) to music. I am playing (play) a computer game at the moment.
7. Put on a raincoat. It will (rain). It rains (rain) a lot in summer.
8. Where are the children? They are reading (read) books in the library.
Find and correct the mistakes.
1. She is wanting to buy a new computer
wants
2. My children doesn't reading.
don't
3. We have breakfast now.
are having
4.The girls are skip in the playground.
skipping
5. Ann gets up at 6 o'clock and is having breakfast every day.
has
6. I'm sorry I don't have time. I cook dinner
am cooking
1 be careful ! the teacher ( look) is looking at you
2 our school perfomance (start) started late last sunday because of the heavy rain
3 the boy (learn) has leant for three years, but he can't understand this letter
1 be careful ! the teacher is looking at you
2 our school perfomance started late last sunday because of the heavy rain
3 the boy have learnt for three years, but he can't understand this letter
Học tốt bạn nhé ^^!~
1. armchair
3. bookshelf
5. stereo
7. atoll
2. television
4. crush
6. telephone
8. living room
Có mấy câu mình ghi đại ^v^
Dù sao thì bạn nhé!
Mk làm đầu tiên đấy
1. Armchair.
2. Television.
3. Bookshelf.
4. Crush.
5. Stereo.
6. Telephone.
7. Atoll.
8. Living room.