Làm hộ mk với ! Chu mi a !
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
S tăng 405 m2 là sao bạn? Chiều dài hay chiều rộng thay đổi như thế nào thì diện tích mới tăng chứ?
Nửa chu vi của HCN đó là:
32 : 2 = 16 (m)
Chiều rộng HCN đó là:
32 : 8 = 4 (m)
Chiều dài HCN đó là:
16 - 4 = 12 (m)
Diện tích HCN đó là:
12 x 4 = 48 (m2)
Đ/S: 48 m2
Chúc bạn học tốt !!!
Chiều rộng hình chữ nhật đó là :
32 : 8 = 4 m
Nửa chu vi hình chữ nhật đó là :
32 : 2 = 16 m
Chiều dài hình chữ nhật đó là :
16 - 4 = 12 m
Diện tích hình chữ nhật đó là :
12 x 4 = 48 m2
~Moon~
CÁC BN LÀM HỘ MK VỚI MK CẢM ƠN !
THANKS BN !!!!!!
Câu 1: Các quốc gia cổ đại Phương Đông ra đời : Từ cuối thiên niên kỉ IV đến đầu thiên niên kỉ III TCN .Còn các quốc gia cổ đại phương Tây ra đời: Từ đầu thiên niên kỉ I TCN .
Câu 6 : Nhà nước Văn Lang ra đời trong hoàn cảnh : Việc mở rộng nghề nông trồng lúa nước ở vùng đồng bằng ven các con sông lớn gặp nhiều khó khăn .
( Nêu nhận xét )
Vì vậy,cần phải có ng chỉ huy đứng ra tập hợp nhân dân các làng bảng chống lại lụt lội , bảo vệ mùa màng
Theo mình nghĩ thì bạn đưa thiếu đề.Nếu đầy đủ thì đề . Ở đây phải cho thêm a>0,b>0
Vì a>0,b>0 nên a+b>0 và 1/a >0 ;1/b>0
Vì 1/a>0 ; 1/b>0 nên 1/a +1/b >0
Áp dụng bđt Cô-si với 2 số a và b >0, ta có;
a+b>_ 2 x căn ax b (1)
Áp dụng bđt Cô-si với 2 số 1/a và 1/b >0, ta có;
1/a +1/b >_ 2 x căn 1/a x 1/b (2)
Nhân (1)với(2) ta có:
(a+b)(1/a+1/b) >_ (2 x căn a x b)( 2 x căn 1/a x 1/b)
=>(a+b)(1/a+1/b) >_ 4 x căn a x b x 1/a x 1/b
=>(a+b)(1/a+1/b) >_ 4 (đpcm)
Dreams become tourist guides (Ước mơ trở thành hướng dẫn viên du lịch)
Society has been developed, which is attached to the improvement of the material life and spiritual needs of people and from which higher. In parular, tourism is one of the requirements is becoming increasingly popular, tourism is developed from that. Evident from the fact that with passion from childhood, I have grown in my dreams someday become a tour guide, and I myself will choose it as a career to develop the relatives in the future.
Since childhood, I have dreamed of traveling all over the country. What could be better than to be sitting on the bus, train traveling across the length of the S-shaped strip of land. Each area where all the mysteries in her own history, geography, it makes travel more enjoyable. Over the first trip of his desire to become a tour guide in intense when I rolled my eyes of you listening guides unhesitatingly in a certain place, or when I was fascin ated by the game little different on each bus, by complaints was too arulate their humor. In my mind, they are very talented. Growing up, I began to noe other criteria for choosing a career as social needs, career opportunities, etc ... But it seems that tourism and especially vocational instructors never out of fashion. Tour guide is always in the top of the industry long-term development and sustainability. Since then, I even brought in his determination to become a tour guide. Tour guides will "get" a lot. I'm going to go a lot of places, being exposed to many, many cultures with traditions of their own. I will have the opportunity to learn new things about each of their country as well as more experienced for themselves. I will also hone and develop a lot of skills, personality and skills of self-management group of tourists, game management skills, sense of responsibility, dynamism, flexibility and dexterity. In addition, the knowledge of history, geography, foreign language will be carried out using regularly. All of them are my favorite subjects from the second level, and is the subject that I can be proud that he learned well. The income of the profession is also quite high and stable. If you are a man of ability and knowledge, become a tour guide will help you be more successful in life and work. The tour guide also brought in his noble mission. They both advertisers, just as diplomats. They are directly promote the image of our country to the world, to bear all the glibly express all the beauty is Vietnam. In addition, the guide is an important factor contributing to the development of the tourism industry. Today, tourism is increasingly becoming a vital economic sectors, bringing many benefits to the national economy as well as to guide the economy. Thus, the role of tour guide is extremely important. Really proud of how they are standing in the ranks of guides to help the country. Careers travel guides, as well as many other professions, there are challenges, sacrifices. But I loved it and determined to try to learn well the cultural and technical skills required for this job. For me, this is a job that can help develop themselves and contribute to the country effectively.
nhiều bài thế
Bạn chỉ cần làm đến bài 7 thôi Đỗ Diệu Linh