gọi tổng là S

ta có:S= 4+2²+2³+2⁴+...+2²⁰¹³

2S= 8+2³+2⁴+2⁵+...+2²⁰¹⁴

2S-S= (8+2³+2⁴+2⁵+...+2²⁰¹⁴)-(4+2²+2³+2⁴+...+2²⁰¹³)

 S    =  4+2²⁰¹⁴-4

S     =  2²⁰¹⁴

vậy x=2014

Mk nhìn ngang ko được rõ bạn ơi

4888

tick nha dung 1200% day nha

Pizza là danh từ số ít, có nghĩa là

80% = \(\frac{80}{100}\)= \(\frac{4}{5}\)

ta cos sơ đồ :

nam : I-----I-----I-----I-----I

nữ : I-----I-----I-----I-----I-----I

số học sinh nam của lớp là :

36 : ( 4 + 5 ) x 4 = 16 ( học sinh )

      đáp số : 16 học sinh

tick mình nha

     đáp số : 20 học sinh

tick mình nha

What is her favorite subject?

≥≥≥≥Which subject does she like?

1. is / an / orange juice/ thousand / three / dong
-> An orange juice is three thousand dong.

2. rice / you / how much / do / want ?
-> How much rice do you want?

1.a.brushed b.changed c.combed d.ironed (khác ở ed)

2.a.send b.souvenir c.shed d.wedding(khác ở e)

1.a.says b.plays c.stays d.days(khác ở ays)
.2.a.comedy b.doll c.crocodile d.front(khác ở o)

Reported Speech

1. "Don't go there alone, Julia'' Meg told here
-> Meg told Julia not to go there alone.

2. '' You'd better take a short holiday, June''. Said Pauline
-> Pauline advised June to take a short holiday.

3. ''Don't argue with me'' the teacher said to the boy
-> The teacher told the boy not to argue with him.

4. ''Do you want to go out for dinner with me, Kate?'' He said
-> He told Kate if he wanted to go out for dinner with him.

5. ''I'll follow you wherever you go'' He said to me
-> He said that he would follow me wherever I go.

6. ''I'll kill your son if you call the police.'' The kidnapper told them
-> The kidnapper threatened he would kill their son if they called the police.

7. ''If I were you, I wouldn't accept his invitation '' Kim said to Lyrn
-> Kim advised Lyrn not to accept his invitation.

8. '' Remember to put on your dirty clothes in this basket, boy'' Said the mother
-> The mother told the boy to remember to put on his dirty clothes in that basket.

9. '' Follow that car'' He said to me
-> He told me to follow that car.