$y=\sqrt{3x^2+6x+10}=\sqrt{3x^2+6x+3+7}$
$=\sqrt{3(x^2+2x+1)+7}=\sqrt{3(x+1)^2+7}$
Ta có: $3(x+1)^2\ge 0$
$\to 3(x+1)^2+7\ge 7$ với mọi $x$
$\to y=\sqrt{3(x+1)^2+7}\ge \sqrt{7}$ với mọi $x$
Vậy tập giá trị của hàm số: `T=[\sqrt{7};+\infty)`
Reading: 1).Do you often read? What is your favourite kind of book to read? 2).Do you often read newspapers? 3).Do you have any e-books? 4).What books did you read as a child? 5).Do you think it is important to encourage children to read? Cảm ơn :>
Giúp em với ạ Đề bài: viết 1 đoạn văn ngắn bằng tiếng anh khoảng 200 từ viết về quê hương (ai rảnh dịch hộ em ạ ) (50 điểm có đủ ko ạ)
1. Nothing could stop her from reaching her goal. She was (determinded/ effective/ thoughtful/ interested). 2. A (coward/ brave/ cruel/ boring) person is not afraid of anything. 3. He was (determinded/ disloyal/ loyal/ honest). He always supported the emperor. 4. Thach Sanh was (lazy/ disciplined/ respectful/ brave). He worked very hard every day to support his family. 5. She is bad and always wants to hurt people. She is (evil/ harmful/ moral/ kind) 6. A (unwise/ clever/ wise/ cunning) person is intelligent and gives good advice. 7. Tam feels sympathy for people who are suffering. She is (generous/ compassionate/ interesting/ loyal). 8. The prince was (handsome/ thoughtful/ humble/ generous). He always gave things to other people. 9. While I (watched/ was watching/ watch/ am watching) the performance, I met one of my old friends. 10. The girl was crying when a fairy (appeared/ was appearing/ appears/ is appearing).
mình cần gấp 3 ý này ạ giúp mình vs
Calli Bảo Bình (digi) - Có tâm,đổ bóng,nền caro -Nếu vieext ko đẹp xin nhường slot Nl: Nếu muốn tìm người dùng hoidap thì tìm như nào v ạ? hình như ko tìm đc đúng ko ạ?
Chứng minh 2 vế bằng nhau. (a² + b²).(c² + d²)= (ac + bd)² + (ad - bc)² Giúp mik vs ạ hứa cho ctlhn
Giúp mik nka mấy bn Hứa vote tim đầy đủ^^
Vẽ mầm bị trừ điểm trong Hoidap247.com Viết tên , hashtag đầy đủ
Exercise 2: Trong số những câu sau đây, có những câu chứa một lỗi sai và có những câu chính xác. Nếu câu đó đúng, bỏ qua, nếu câu đó sai, hãy tìm và sửa lỗi sai. 1. The president, surrounded by secret service agents, is trying to make his way to the podium. 2. The buildings is destroyed during the fire are being rebuilt at the taxpayers’ expense. 3. 20 percent of the forest has been destroyed lately. 4. The witnesses saw that most of the fire in the hills was extinguished. 5. Some of the animals from the zoo was released into the animals preserve. 6. All of the students in the class taught by Professor Roberts is required to turn in their term papers next Monday. 7. Half of the food that we are serving to the guests is still in the refrigerator. 8. We believe that some of the employees is going to get promoted soon. 9. The people in the apartment next to mine are giving a party this evening. 10. Each of the doctors in the building need to have a separate reception area. ( mn giúp e bài này vs, khó quá đi , cảm ơn ạ)
$\left \{ {{\dfrac{3x-2y}{5}-1=x-\dfrac{5x-3y}{3} } \atop {\dfrac{4x-3y}{2}}-y=1-\dfrac{2x-3y}{3}} \right.$ giúp mik vs
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