Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Lời giải:
Vì $a$ là số nguyên tố lớn hơn $3$ nên $a$ có thể có dạng $6k+1, 6k+5$ với $k\in\mathbb{N}$
Nếu $a=6k+5\Rightarrow 10a+1=10(6k+5)+1=60k+51=3(20k+17)\vdots 3$ và $10a+1>3$ nên $10a+1$ không thể là số nguyên tố (trái giá thiết)
Do đó $a=6k+1$
Khi đó: $5a+1=5(6k+1)+1=6(5k+1)\vdots 6$ (đpcm)
English is a very important language in our daily life, but it is an imaginary thing, so we need to use it properly through daily life. Unlike ordinary objects like books that can be grasped, with English we have to turn it into actions. As we practice speaking English every day, then after we speak English fluently, we can use English to speak everyday. And can listen to English to supplement English capital for speaking. Help me speak better, because English is a foreign language for us. And you also have to use English sentence patterns correctly with grammar and not make any mistakes, if so, chances are that the other person will correct you or they will be very angry. English is very important, please apply it in everyday life to make life a better place
Hi. My name is Tram. I am a student at Trinh Hoai Duc primary school. Every day, I usually get up at 6 o'clock. I brush my teeth and wash my face. Then, I have breakfast at 6.30. After having breakfast, I go to school with my younger brother. I go to our school on foot. I have to start my classes at 7 o'clock. At 12 o'clock, I have lunch at school. At 2 p.m , I have to start my classes again. I finish my classes at 4.30 p.m. I go home and take a shower. I have dinner at 7 p.m. Then, I do all my homework. I often go to bed at 10 p.m.
Hello. My name is Nguyen. My habit always start with brush my teeth after get up in the morning at 6 a.m. Then, I do morning exercise with my sister. After, I have breakfast with two eggs, a sandwich and a glass of milk. After breakfast, I brush hair. Next, I do my homework with my friends. And I have lunch at 10 a.m. In the afternoon, I do my homework and go cycling with my friends from 2 p.m to 4 p.m. Then, I fly kite with my brother. We are so happy. At 5 p.m, I take a shower and then at 6 p.m, I help mom with dinner. We have dinner at 7 p.m. At 8 p.m in the evening, I listen to music or read books. I go to bed at 10 p.m. That's what my day is like.