b) Điền vào chỗ trống các ký hiệu : ∈

ND

Nguyễn Duy Khang

9 tháng 11 2021

b) Điền vào chỗ trống các ký hiệu : ∈;∉;⊂

5…..A Æ……A {9,10,11}…….A

#Toán lớp 6

1

NL

Nguyễn Lê Phước Thịnh

9 tháng 11 2021

Đề thiếu rồi bạn

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MN

Mai Nguyễn Bảo An

26 tháng 10 2021 - olm

a Viết tập hợp A các số tự nhiên lớn hơn 20 và nhỏ hơn 27 theo hai cách. b Điền các ký hiệu vào chỗ trống….. 22……..A 27...........A

#Toán lớp 6

2

TM

Trần Mạnh Quân

26 tháng 10 2021

a,A={21;22;23;24;25;26}

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TM

Trần Mạnh Quân

26 tháng 10 2021

22 thuộc A;27 không thuộc A(xin lỗi vì mình không biết viết dấu)

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TT

Trần Thị Mỹ Trang

3 tháng 3 2020 - olm

Điền cụm từ thích hợp vào chỗ trống trong các phát biểu sau

1\ Tam giác XUV là hình gồm ...... Ký hiệu :......

2\ Đường tròn tâm A , bán kính m là hình gồm .....Ký hiệu :......

#Toán lớp 6

0

HN

Huyền Nguyễn

8 tháng 12 2021

Dạng 1: Tập hợp Bài 1: a/ Viết tập hợp A các số tự nhiên lớn hơn 9 và nhỏ hơn 18 theo hai cách. b/ Điền các ký hiệu thích hợp vào chỗ trống: 9 …. A ; 17 …. A;Bài 2: Bằng cách liệt kê các phần tử, Hãy viết các tập hợp sau:a) Tập hợp M các số tự nhiên nhỏ hơn 9.b) Tập hợp C các số tự nhiên không vượt quá 7.c) Tập hợp D các số tự nhiên lớn hơn 13 nhỏ hơn 21.d) Tập hợp K...

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#Toán lớp 6

1

NL

Nguyễn Lê Phước Thịnh

8 tháng 12 2021

Bài 2:

a: M={0;1;2;3;4;5;6;7;8}

b: C={0;1;2;3;4;5;6;7}

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J

Jackbroun23

12 tháng 9 2021

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)1. We are looking for _______ place to spend ________ night. A. the/the B. a/the C. a/a D. the/a2. Please turn off ________ lights when you leave ________ room. A. the/the B. a/a C. the/a D. a/the3. We are looking for people with ________experience. A....

Đọc tiếp

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)

1. We are looking for _______ place to spend ________ night.

A. the/the B. a/the C. a/a D. the/a

2. Please turn off ________ lights when you leave ________ room.

A. the/the B. a/a C. the/a D. a/the

3. We are looking for people with ________experience.

A. the B. a C. an D. x

4. Would you pass me ________ salt, please?

A. a B. the C. an D. x

5. Can you show me ________way to ________station?

A. the/the B. a/a C. the/a D. a/the

6. She has read ________interesting book.

A. a B. an C. the D. x

7. You’ll get ________shock if you touch ________ live wire with that screwdriver.

A. an/the B. x/the C. a/a D. an/the

8. Mr. Smith is ________ old customer and ________ honest man.

A. An/the B. the/an C. an/an D. the/the

9. ________ youngest boy has just started going to ________ school.

A. a/x B. x/the C. an/x D. the/x

10. Do you go to ________ prison to visit him?

A. the B. a C. x D. an

11. ________eldest boy is at ________ college.

A. a/the B. the/x C. x/ a D. an/x

12. Are you going away next week? No, ________ week after next.

A. an B. a C. the D. x

13. Would you like to hear ________ story about ________ English scientist?

A. an/the B. the/the C. a/the D. a/ an

14. There’ll always be a conflict between ________ old and ________ young.

A. the/the B. an/a C. an/the D. the/a

15. There was ________ collision at ________ corner.

A. the/a B. an/the C. a/the D. the/the

16. My mother thinks that this is ________ expensive shop.

A. the B. an C. a D. x

17. Like many women, she loves ________ parties and ________gifts.

A. the/ a B. a/the C. a/a D. x/x

18. She works seven days ________ week.

A. a B. the C. an D. x

19. My mother goes to work in ________ morning.

A. a B. x C. the D. an

20. I am on night duty. When you go to ________ bed, I go to ________ work.

A. a/x B. a/the C. the/x D. x/x

Exercise 2: Câu chuyện sau được chia thành các câu nhỏ, hãy đọc và điền mạo từ thích hợp “a/an/ the hoặc x (không cần mạo từ)” vào chỗ trống:

1. There was ________knock on ________door. I opened it and found ________small dark man in ________blue overcoat and _______woolen cap.

2. He said he was ________employee of ________gas company and had come to read ________meter.

3. But I had ________suspicion that he wasn't speaking ________truth because ________meter readers usually wear ________peaked caps.

4. However, I took him to ________ meter, which is in ________dark corner under ________ stairs.

5. I asked if he had ________ torch; he said he disliked torches and always read ________ meters by ________light of ________match.

6. I remarked that if there was ________leak in ________ gas pipe there might be ________ explosion while he was reading ________meter.

7. He said, “As ________matter of ________fact, there was ________explosion in ________last house I visited; and Mr. Smith, ________owner of ________house, was burnt in ________face.”

8. “Mr. Smith was holding ________lighted match at ________time of ________explosion.”

9. To prevent ________possible repetition of this accident, I lent him ________torch.

10. He switched on ________torch, read ________meter and wrote ________ reading down on ________back of ________envelope.

11. I said in ________surprise that ________meter readers usually put ________readings down in ________book.

12. He said that he had had ________book but that it had been burnt in ________fire in________ Mr. Smith's house.

13. By this time I had come to ________conclusion that he wasn't ________ genuine meter reader; and ________moment he left ________house I rang ________police.

Exercise 3: Điền mạo từ thích hợp “a/an/the hoặc x (không cần mạo từ)”” vào chỗ trống.

14. Are John and Mary ________cousins? ~

No, they aren't ________cousins; they are ________brother and ________sister.

15. ________fog was so thick that we couldn't see ________ side of ________road. We followed ________car in front of us and hoped that we were going ________right way.

16. I can't remember ________exact date of ________storm, but I know it was on ________Sunday because everybody was at ________church. On ________Monday ________post didn't come because ________roads were blocked by ________fallen

trees.

17. Peter thinks that this is quite ________ cheap restaurant.

18. A: There's ________murder here. ~

B: Where's ________body?~

A: There isn't ________body. ~

B: Then how do you know there's been ________murder?

19. Number ________hundred and two, - ________house next door to us, is for sale.

It's quite ________nice house with ________big rooms ________back windows look out on ________park.

20. I don't know what ________price ________owners are asking. But Dry and Rot are ________agents. You could give them ________ring and make them ________offer.

21. ________postman's little boy says that he'd rather be ________dentist than ________doctor, because ________dentists don't get called out at ________night.

22. Just as ________air hostess (there was only one on the plane) was handing me ________cup of ________coffee ________plane gave ________lurch and ________ coffee went all over ________person on ________other side of ________gangway.

23. There was ________collision between ________car and ________cyclist at ________ crossroads near ________my house early in ________morning.

24. Professor Jones, ________man who discovered ________new drug that everyone is talking about, refused to give ________press conference.

25 Peter Piper, ________student in ________ professor's college, asked him why he refused to talk to ________press.

#Tiếng anh lớp 9

0

NY

Nhi Yến

2 tháng 4 2022

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)1. We are looking for _______ place to spend ________ night. A. the/the B. a/the C. a/a D. the/a2. Please turn off ________ lights when you leave ________ room. A. the/the B. a/a C. the/a D. a/the3. We are looking for people with ________experience. A. the ...

Đọc tiếp

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)
1. We are looking for _______ place to spend ________ night.
A. the/the B. a/the C. a/a D. the/a
2. Please turn off ________ lights when you leave ________ room.
A. the/the B. a/a C. the/a D. a/the
3. We are looking for people with ________experience.
A. the B. a C. an D. x
4. Would you pass me ________ salt, please?
A. a B. the C. an D. x
5. Can you show me ________way to ________station?
A. the/the B. a/a C. the/a D. a/the
6. She has read ________interesting book.
A. a B. an C. the D. x
7. You’ll get ________shock if you touch ________ live wire with that screwdriver.
A. an/the B. x/the C. a/a D. an/the
8. Mr. Smith is ________ old customer and ________ honest man.
A. An/the B. the/an C. an/an D. the/the
9. ________ youngest boy has just started going to ________ school.
A. a/x B. x/the C. an/x D. the/x
10. Do you go to ________ prison to visit him?
A. the B. a C. x D. an
11. ________eldest boy is at ________ college.
A. a/the B. the/x C. x/ a D. an/x
12. Are you going away next week? No, ________ week after next.
A. an B. a C. the D. x
13. Would you like to hear ________ story about ________ English scientist?
A. an/the B. the/the C. a/the D. a/ an
14. There’ll always be a conflict between ________ old and ________ young.
A. the/the B. an/a C. an/the D. the/a
15. There was ________ collision at ________ corner.
A. the/a B. an/the C. a/the D. the/the
16. My mother thinks that this is ________ expensive shop.
A. the B. an C. a D. x
17. Like many women, she loves ________ parties and ________gifts.
A. the/ a B. a/the C. a/a D. x/x
18. She works seven days ________ week.
A. a B. the C. an D. x
19. My mother goes to work in ________ morning.
A. a B. x C. the D. an
20. I am on night duty. When you go to ________ bed, I go to ________ work.
A. a/x B. a/the C. the/x D. x/x

#Tiếng anh thí điểm lớp 6

1

MH

Minh Hồng

2 tháng 4 2022

Exercise 1: Chọn đáp án đúng để điền vào chỗ trống (chú ý: ký hiệu “x” có nghĩa là không cần mạo từ)
1. We are looking for _______ place to spend ________ night.
A. the/the B. a/the C. a/a D. the/a
2. Please turn off ________ lights when you leave ________ room.
A. the/the B. a/a C. the/a D. a/the
3. We are looking for people with ________experience.
A. the B. a C. an D. x
4. Would you pass me ________ salt, please?
A. a B. the C. an D. x
5. Can you show me ________way to ________station?
A. the/the B. a/a C. the/a D. a/the
6. She has read ________interesting book.
A. a B. an C. the D. x
7. You’ll get ________shock if you touch ________ live wire with that screwdriver.
A. an/the B. x/the C. a/a D. an/the
8. Mr. Smith is ________ old customer and ________ honest man.
A. An/the B. the/an C. an/an D. the/the
9. ________ youngest boy has just started going to ________ school.
A. a/x B. x/the C. an/x D. the/x
10. Do you go to ________ prison to visit him?
A. the B. a C. x D. an
11. ________eldest boy is at ________ college.
A. a/the B. the/x C. x/ a D. an/x
12. Are you going away next week? No, ________ week after next.
A. an B. a C. the D. x
13. Would you like to hear ________ story about ________ English scientist?
A. an/the B. the/the C. a/the D. a/ an
14. There’ll always be a conflict between ________ old and ________ young.
A. the/the B. an/a C. an/the D. the/a
15. There was ________ collision at ________ corner.
A. the/a B. an/the C. a/the D. the/the
16. My mother thinks that this is ________ expensive shop.
A. the B. an C. a D. x
17. Like many women, she loves ________ parties and ________gifts.
A. the/ a B. a/the C. a/a D. x/x
18. She works seven days ________ week.
A. a B. the C. an D. x
19. My mother goes to work in ________ morning.
A. a B. x C. the D. an
20. I am on night duty. When you go to ________ bed, I go to ________ work.
A. a/x B. a/the C. the/x D. x/x

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TB

Thiên Bình dễ thương

19 tháng 6 2017 - olm

cho M= {x;y}, điền ký hiệu \(\in,\notin,\subset\),= vào chỗ trống

x...M {y}....M {x, y}.......M z...M

#Toán lớp 6

2

NV

nguyển văn hải

19 tháng 6 2017

\(\in\)thuộc
\(\subset\)con
=
\(\notin\)ko thuộc

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BB

Băng băng

19 tháng 6 2017

Giả sử số cần tìm là x=a1a2...an , (a1≠0). Khi đó nếu chuyển chữ số cuối cùng lên đầu tiên thì ta được số y=ana1a2...an−1. Khi đó y = kx, k nguyên. Theo giả thiết thì y lớn hơn x nên a1≥1. Lại có y chia hết cho x nên a1>1.

Gọi m=0,a1a2...ana1a2...an...;n=0,ana1a2...an−1ana1... là các số thập phân vô hạn tuần hoàn tương ứng tạo bởi x và y.

Ta thấy 0,a1a2...ana1a2...an=x10n ⇒m=x10n−1 , tương tự n=y10n−1 =kx10n−1 . Vậy n = km.

Chúng ta lại có n=an10 +m10 ⇒10n=an+m⇒10km=an+m⇒m=an10k−1

Ta thấy 10m=10an10k−1 =a1,a2a3...>1⇒an≥k

x nhỏ nhất khi m nhỏ nhất. Với mỗi k cố định, m nhỏ nhất khi an=k.

Vậy ta thử các giá trị của k (Từ 0 tới 9) và thấy m có giá trị nhỏ nhất khi k = 4. Khi đó m=0,(102564)⇒x=102564.

Vậy số cần tìm là 102564.

k mình nha

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PT

Pham Trong Bach

24 tháng 6 2017