Nếu k là số lẻ thì 15k + 1 là số chẵn hay 15k + 1 là hợp số.

Nếu k là số chẵn thì 15k + 1 có thể là hợp số cũng có thể là số nguyên tố.

Với mọi k \(\in\) N thì 15k + 1 là hợp số hay nguyên tố chưa thể xác định được.

phần a sai đề bạn nhé

giúp với ạ, đề bài là viết câu trên dưới dạng phủ định

1. That park is not the most beautiful.

2. Tina is not fond of skateboarding.

3. I am fond of going to the cinema in my free time.

4. Is Jame fond of playing after school?

1 A

2 B

3 D

4 A

56 = 2³.7

108 =2².3³

ƯCLN(56 ;108) = 2² = 4

CD bằng số đề-xi-mét là:

     2+35=37 (dm)

          Đáp số: 37 dm

Văn Lang-Âu Lạc

chính xác thì là văn lang nha

Đúng: Tết Nguyên đán, Lễ Giáng sinh, Lễ Quốc khánh

Sai: Tết Đoan ngọ, Tết Hàn thực

\(-5,2+3,5.\left(-2\right)-6,9:3+\left(-0,04\right)\\ =-5,2-7-2,3-0,04\\ =-5,2-3-0,04\\ =-8,24\)

TK:

=−5,2−7−2,3−0,04

=−5,2−3−0,04

=−8,24

1. Sports and games are very important in out lives. 

2. Television programmes about sports are also very popular. 

3. The Olympic Games first took place in Greece in 776 BC. 

4. Try to get up early and do some exercise. 

5. He became the world tennis champion when he was very young.

6. Don't use the lift when there is fire. 

7. What equipment do you need to play the sport? 

8. Mai will meet Duong at Superfit Club on Sunday. 

1. very/and/are/our/important/games/lives./in/Sports

Sports and games are very important in our lives

2. Television/very/about/popular./sports/programmes/also/are

Television programmes about sports are also very popular

3. first/in/place/ Greece/ BC/776/in/ The Olympic Games/took/.

The Olympic Games first took place in Greece in 776 BC

4. get/to/ Try/exercise/ do/ some/early/up/to/>

Try to get up early to do some exercise

5. became when/ the/young/ world tennis/ He/ was/ very/he

He became the world tennis  when he was very young

6. use/ the lift/ when/fire./ Don't/ is/ there =>

Don't use the lift when there is fire

7.do/you/the/equipment/ sport?/play/What/to/need

What equipment do you need to play sport?

8. Mai//meet/Superfit/on/Club/and/will/at/Duong/Sunday.

Mai will meet Duong at Superfit club on Sunday