3. Tìm x,y,f. Ta có: 28xy chia hết cho 90
4. Tìm n€N:
p=5n2+6n là số tự nhiên
5. Chứng minh rằng:n€N thì
(n+2016)×(n+2017)-n2-n chia hết cho 2
6. Chứng minh rằng:
a) 8^5+2^11 chia hết cho 17
b) 8^7-2^18 chia hết cho 14
7. Tìm x, y€N để:
a) (x+2)×(2y-1)=2x+5
b) (3x+1):(y-1)=4x+4
8. Tìm x, y€ N để:
10x+9y=39
LÀM GIÚP MÌNH VỚI NHA!!!!!!!!!!!!!!!!!!!
Thánh you
Complete the text. Use the present perfect, affirmative or negative.
Jane Williams is getting married in July. Her parents are planning the wedding. They 1__________(decide) which relatives and friends they want to invite, but they 2____________(not send) the invitations. They 3_________(speak) to the priest and Jane's dad 4_________(find) a hotel for the party. Jane's mum 5________(make) the cake but she 6___________(not choose) the flowers yet. They 7__________(not buy) Jane and her boyfriend a present yet.
Write questions with How long ...? Then write true answers with for or since
Ex:
1 you/ be
Write questions with How long ...? Then write true answers with for or since
Ex:
1 you/ be
Write questions with How long ...? Then write true answers with for or since
Ex:
1 you/ be/ in this class?
How long have you been in this class?
I've been in this class since September.
2 your teacher/ know/ you?
3 you/ live/ in your house or flat?
4 you/ study/ English?
5 you/ have/ your shoes?
Dear Amy
It's now day 3 of our walking holiday in the Alps. We 1_____________(be) here since Saturday. We're really tired because we 2___________(walk) more than 100 km . We 3________(not stay) at a single hotel. We 4__________(sleep) in our tent every night, so we 5___________(save) lots of money.
The mountains are really beautiful-we 6__________(buy) lots of postcards to show you. The night 7____________(be) cold, so Julie 8____________(not enjoy) it very much!
See you soon
Bill
1. What is your favourite subject at school?
2. How do you get to school every day?
3. Where is your school? What is the name of your school?
4. How many students does your school have?
5. Where do you live?
6. How many rooms are there in your house?
7. What is your favourite room? Why?
8. What are there in your living room?
9. Who is your best friend?
10. Desribe yourself?
11. Desribe your best friend?
12. What character do you like best about your best friend?
13. Where is your neighborhood? Where is your house?
14. Where are there in your neighborhood?
15. Is there a temple in your neighborhood?
16. What are there near your house?
17. What do you need when you travel?
18. What is highest mountain in the world?
19. Where can you go on your summer holiday?
20. What things do we often see at Tet?
21. What do people often do at Tet?
22. What shouldn't we do at Tet?
23. What do you like best about Tet?
TRẢ LỜI TẤT CẢ CÁC CÂU HỎI CỦA MÌNH VỚI.
THANKS
1.What is your favourite subject at school?
2. How do you get to school every day?
3. Where is your school? What is the name of your school?
4. How many students does your school?
5. Where do you live?
6. How many rooms are there in your house?
7. What is your favourite room? Why?
8. What are there in your living room?
9. Who is your best friend?
10. Desribe yourself.
11. Desribe your best friend?
12. What character do you like best about your best friend?
13. Where is your neighborhood? Where is your house?
14. Where are there in your neighborhood?
15. Is there a temple in your neighborhood?
16. What are there near your house?
17. What do you need when you travel?
18. What is the highest mountain in the world?
19. Where can you go on your summer holiday?
20. What things do we often see at Tet?
21. What do people often do at Tet?
22. What shouldn't we do at Tet?
23. What do you like best about Tet?