Tìm số nguyên n để : 7n ⋮ 3 Vì cs nhiều số n nên có thể nêu dạng tổng quát của n nha

2 câu trả lời

Vì `7n \vdots 3` nên `7n` là bội của `3`

`-> n = 3k ( k ∈ NN )`

`Đáp` `án:`

`7n ⋮ 3`

Là những số `nhân` cho `7` chia hết cho `3`

`N``= {3;6;9;}`

 

Câu hỏi trong lớp Xem thêm

Bài 1: Chia động từ trong ngoặc ở thì phù hợp 1. I (write)............ to my parents now, I (write)............... to them every weekend. 2. Usually, I (read)............... 2 newspapers, but not the same one every day. On Sundays, I (buy).................. four or five. 3. I can't (swim)................... , so I shouldn't (run)................. too far from the shore. 4. I haven't got a car at the moment, so I (go)............... to work on the bus this week. Usually I (drive)................. to work. 5. She is very interested in (read).............. books. 6. Please be quiet! I (try)........... to concentrate. 7. Look! it (snow).............. 8. The sun (rise)................ in the west. 9. You (go)................. to the party tonight? 10. Let's (go).................. to the zoo. 11. Hurry! The bus (come).................... I don't want to miss it. 12. You can borrow my umbrella. I (not/ need)................ it at the moment. 13. How about (go)......................... on foot? 14. He (want)................ (be)................... a doctor. 15. Why we (not, go)................... to the cinema? Bài 2: Tìm và sửa lỗi sai trong mỗi câu dưới đây: 1. There are four person in Mrs. Phong's family. 2. How much bottles of water do you have? 3. I am going to school every morning. 4. There is a museum on the right of my house. 5. How much money is the table? 6. She is going to travel to Thailand for a little days. 7. Which colour is it? 8. I like going on car. 9. Your health must be checked twice one year. 10. Who is taller in our class? ai làm xong mình sẽ cho 5 sao 1 cảm ơn và 1 câu trả lời hay nhất

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