Find all positive integers n for which 2014n + 11n is a perfect spuare

DA

Đức Anh 2k9

31 tháng 7 2018 - olm

Eleven consecutive positive integers are written on a board. Maria erases one of the
numbers. If the sum of the remaining numbers is 2012, what number did Maria
erase?

#Tiếng anh lớp 6

3

TR

Thỏ Ruby

31 tháng 7 2018

11 số nguyên dương liên tiếp được viết trên bảng. Maria xóa một trong những số. Nếu tổng 10 số còn lại là 2012, Maria xóa số nào?

Bài giải:

Gọi số đầu tiên là a thì 11 số liên tiếp là a + 1 đến a+ 10
tổng của 11 số đó là 11 a + 55
Vì tuấn xóa đi 1 số nên tổng của 10 số sẽ thuộc [10a + 45 , 9a + 55]

..........

Mik làm mới đến chỗ nầy thôi bạn tự làm tiếp nhé!

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TR

Thỏ Ruby

31 tháng 7 2018

Bạn ơi!Bạn dựa theo bài này mà làm nhé! ............. Hok Tốt nhé ..............

Tuấn xoá đi 1 trong 10 số nguyên
dương liên tiếp. Tổng của 9 số
còn lại bằng 2006. Hỏi Tuấn đã
xoá đi số nào?

gọi số đầu tiên là a thì 10 số liên tiếp là a + 1 đến a+ 9
tổng của 10 số đó là 10a + 45
vì tuấn xóa đi 1 số nên tổng của 9 số sẽ thuộc [9a+36 , 9a + 45]
ta có 2006 = 9.222 + 8 = 9.218 + 44 => a = 218 => số đã xóa là 218 .10 + 45 - 2006 = 219

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QC

Quỳnh Chi Ngô

13 tháng 5 2022

VI-Put these verbs into present perfect tense. 1. I (do) ................................... all the housework. The flat is really clean now. 2. He (write) ................................... a novel for two years. 3. I (never meet) ................................... this girl before. 4. My brother (leave) ................................... home for 10 years. 5. I (not see) ................................... my close friend since 2013. 6. My mother...

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#Tiếng anh lớp 6

3

VQ

Vũ Quang Huy

13 tháng 5 2022

1. have done

2. has written

3. have never

4. has left

5. haven't seen

6. has bought

7. has never seen

8. has been

9. have travelled

10. has told

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E

ERROR?

13 tháng 5 2022

1. have done

2. has written

3. have never met

4. has left

5. haven't seen

6. has bought

7. has never seen

8. has been

9. has traveled

10. has told

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CT

Cao Tùng Lâm

28 tháng 9 2021

V. Give the correct form of the verbs (Past Simple or Present Perfect): 1. I ......................... (do) ........................ all the housework. The flat is really clean now. 2. He ........................(write) a novel for two years, but he ...................(not finish) it yet. 3. My brother ................... (leave) ................ home 10 years ago. I ................ (never/ meet) him again since then. 4. I like your car. How long ..................... you...

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#Tiếng anh lớp 6

1

DT

Đỗ Thanh Hải

CTVVIP

28 tháng 9 2021

1. I ..........have done............... (do) ........................ all the housework. The flat is really clean now.

2. He ..........has written..............(write) a novel for two years, but he .............hasn't finished......(not finish) it yet.

3. My brother ...........left........ (leave) ................ home 10 years ago. I ............have never met.... (never/ meet) him again since then.
4. I like your car. How long .............have ........ you ...........had............ (have) it?
5. What .........did you do.............. you .................... (do) last weekend? ....Did............. You .................play....... (play) golf? 6. Mai ............bought..........(buy) ................ a new dress last week, but she ............... ......hasn't worn............................. (not wear) it yet.
7. Mr. Quang ...............has taught....... (teach) math in this school since he ...........graduated..........(graduate) from the university in 1989.
8. ............Have ......... You ....heard............ (hear) of Agatha Christie? She ..............is....... (be) ................................... a novels writer. ................Have.....You ...read.... (read) any of them?
9. When I ........................ (get) ........got.............. home last night, I ........was.......... (be) very tired and I ...................went................ (go) straight to bed.
10. Daniel ...........earned........... (earn) some money last week. But I'm afraid he .......has already spent......... (already/ spend) it all.

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CT

Cao Tùng Lâm

28 tháng 9 2021

nhanh vậy

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Y

ỵyjfdfj

31 tháng 8 2021

I. Put the verbs in brackets in the present perfect or the simple past tense.1. I ...................... (do) all the housework. The flat is really clean now.2. He ...................... (write) a novel for two years, but he ................................. (not finish) it yet.3. My brother ...................... (leave) home 10 years ago. I ................................. (never/ meet) him again since then.4. I like your car. How long ...................... you .........................

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#Tiếng anh lớp 6

1

DK

Dang Khoa ~xh

31 tháng 8 2021

1. have done

2. has written / hasn't finished

3. left / have never met

4. have - had

5. did / do - Did you play

6. bought / hasn't worn

7. has taught / graduated

8. Have you heard - has been - have read

9. got / were / went

10. earned / has already spent

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C

Chimiha

25 tháng 1 2022

IV. Put the verbs in brackets in the present perfect or the simple past tense.1. I ................ (do) all the housework. The flat is really clean now.2. He ...................... (write) a novel for two years, but he ................................. (not finish) it yet.3. My brother ...................... (leave) home 10 years ago. I ................................. (never/ meet) him again since then.4. I like your car. How long ...................... you .........................

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#Tiếng anh lớp 6

3

H

htfziang

25 tháng 1 2022

1. I .......have done.. (do) all the housework. The flat is really clean now.

2. He .....has written..... (write) a novel for two years, but he ............hasn't finished...... (not finish) it yet.

3. My brother ....left..... (leave) home 10 years ago. I ......have never met.. (never/ meet) him again since then.

4. I like your car. How long .......have... you ........had..... (have) it?

5. What ......did........ you .........do.... (do) last weekend? .....Did you play...... (play) golf?

6. Mai ......bought... (buy) a new dress last week, but she ........hasn't worn.. (not wear) it yet.

7. Mr. Quang ......has taught.... (teach) Math in this school since he ..........graduated... (graduate) from the university in 1989.

8. ....Have....... you .........heard.... (hear) of Agatha Christie? She ...is...... ( be) a novels writer. You ......have read......... (read) any of them

9. When I ...got........ (get) home last night, I ......was.......... (be) very tired and I ..........went....... (go) straight to bed.

10. Daniel ....earned........ (earn) some money last week. But I’m afraid he ........has already spent..... (already/ spend) it all.

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LP

Lê Phạm Phương Trang

25 tháng 1 2022

1. has done

2. has written / hasn't finished

3. left / haven't met

4. have / had

5 did/do/Did you play

6. bought / hasn't worn

7. has been teaching / graduated

8. Have/heard/is

9. got / was / went

10. earned / has already spent

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H

huongff2k3

30 tháng 7 2021

Put in the present perfect or past simple of the verds in brackets1. I ......... (do) all the housework. The flat is really clean now.2. He ................ (write) a novel for two years, but he ..................... (not finish) it yet.3. My brother ................... (leave) home 10 years ago. I ...................... (never/meet) him again since then.4. What ............. you ............. (do) last weekend? ....................... you .................... (play) golf?5. I like...

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#Tiếng anh lớp 6

1

DT

Đỗ Thanh Hải

CTVVIP

30 tháng 7 2021

1. I ......have done... (do) all the housework. The flat is really clean now.

2. He .........has written....... (write) a novel for two years, but he .............hasn't finished........ (not finish) it yet.

3. My brother ...........left........ (leave) home 10 years ago. I ........have never met.............. (never/meet) him again since then.

4. What .......did...... you ......do....... (do) last weekend? ..............Did......... you ............play........ (play) golf?

5. I like your car. How long .....have.............. you .................had.... (have) it?

6. Mai .....bought............. (buy) a new dress last month but she .........hasn't worn.......... (not wear) it yet.

7. Mr.Quang ................has taught...... (teach) Math in this school since he ....graduated................. (graduate) from the university in 1989.

8. .............Have........ you ............heard......... (hear) of Agatha Christie? She ........was........ (be) a writer who ......died........... (die) in 1976. She ...........wrote....... (write) more than 70 detective novels. ...............Have...... you .............read.......... (read) any of them?

9. When I ...........got.......... (get) home last night, I ...........was......... (be) very tired and I .........went............ (go) straight to bed.

10. Daneil ...........earned......... (earn) some money last week. But I'm afraid he .....................has already spent... (already/spend) it all.

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PT

Phạm Thị Thu Trang

3 tháng 1 2017

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...

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#Tiếng anh lớp 6

1

TD

Tử Đằng

3 tháng 1 2017

· Jane Williams is getting married in July. Her parents are planning the wedding. They 1_____have decided_____(decide) which relatives and friends they want to invite, but they 2______haven’t sent______(not send) the invitations. They 3_____have spoken____(speak) to the priest and Jane's dad 4____hasn't found_____(find) a hotel for the party. Jane's mum 5____has made____(make) the cake but she 6_____hasn’t chosen______(not choose) the flowers yet. They 7_____haven’t bought_____(not buy) Jane and her boyfriend a present yet.

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D

Đỗ_Hiền_Anh_1234

29 tháng 8 2020 - olm

The colours you paint the rooms in your house can make you comfortable. The following colours can help you to eat, sleep, study and relax in your own home. The bedroom The perfect colour for your bedroom is blue. It is a very relaxing colour, and can make you feel happier and more positive when you wake up at the morning. The living room The perfect colour for your living room is pink. Don't use such colours as red, purple, and black because they don't help you relax. The dining room The...

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#Tiếng anh lớp 6

1

TT

Thanh Truc Vu

29 tháng 8 2020

Màu sắc bạn sơn các phòng trong nhà có thể khiến bạn thoải mái. Những màu sắc sau đây có thể giúp bạn ăn, ngủ, học tập và thư giãn trong chính ngôi nhà của mình.
Phòng ngủ
Màu sắc hoàn hảo cho phòng ngủ của bạn là màu xanh lam. Đây là một màu rất thư giãn và có thể khiến bạn cảm thấy vui vẻ và tích cực hơn khi thức dậy vào buổi sáng.
Phòng khách
Màu sắc hoàn hảo cho phòng khách của bạn là màu hồng. Không sử dụng các màu như đỏ, tím và đen vì chúng không giúp bạn thư giãn.
Phòng ăn
Màu cam có thể khiến bạn cảm thấy đói hơn vào bữa ăn. Nó cũng khuyến khích cuộc nói chuyện thú vị hơn giữa các thành viên trong gia đình.
Nghiên cứu
Màu vàng là một màu tốt cho căn phòng này: nó khiến bạn cảm thấy vui vẻ hơn và giúp bạn suy nghĩ. Nó cũng làm cho vết đen sáng hơn một chút.

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NH

Nguyễn Huy Hoà

15 tháng 11 2017

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