mn giúp e câu này vs. câu hỏi em gửi phần trả lời
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gấp mn giúp em câu này vs ạ e gấp lắm mn giúp em vs em cảm ơn ạ
KV
23 tháng 10 2023
3n + 4 = 3n - 6 + 10
= 3(n - 2) + 10
Để (3n + 4) ⋮ (n - 2) thì 10 ⋮ (n - 2)
⇒ n - 2 ∈ Ư(10) = {-10; -5; -2; -1; 1; 2; 5; 10}
⇒ n ∈ {-8; -3; 0; 1; 3; 4; 7; 12}
Mà n là số tự nhiên
⇒ n ∈ {0; 1; 3; 4; 7; 12}
1. Mum cleans the house every day.
-> The house is cleaned by mum every day.
2. John took the dog for a walk yesterday.
-> The dog was taken for a walk by John yesterday.
3. We buy our clothes from this shop.
-> Our clothes are bought from this shop by us.
4. The teacher corrects the students' homework every day.
-> The students' homework is corrected by the teacher everyday.
5. A terrible storm hit our town two days ago.
-> Our town was hit by a terrible storm two days ago.
6. Sally gave me this beautiful bracelet.
-> This beautiful bracelet was given by Sally.
7. Does Dad cook dinner on Fridays?
-> Is dinner cooked by Dad on Fridays?
8. People all over the world drink coffee.
-> Coffee is drinked by people all over the world.