`x^2(1+y^2)+y^2(1+z)^2+z^2(1+x^2) ≥6xyz`

Đặt dấu (.) và (?) và (!) vào chỗ thích hợp

1. Tìm B\A và $C_{R}B$: a, A= [-1,2]; B=(1;5] b, A= (- ∞;0]; B= [0;+ ∞) c, A= [0;2]; B=(2;5) 2. Tìm A ∩ B ∩ C và A ∪ B ∪ C: a, A=[-2;2]; B= (0;4); C= (-1;0) b, A= (-5;1]; B= [3;+ ∞); C= (-∞; -2) 3. Cho hai tập khác rỗng A=(m-1;4) và B= (-2; 2m+2), với m ∈ R. Xác định m để: a, A ∩ B $\neq$ ∅ b, A ⊂ B c, B ⊂ A

1,Tìm ƯCLN: a, 42,64,56 b, 36,72,90

Bài12. Đọc đoạn văn dưới đây và điền T(True) trước câu có nội dung đúng với nội dung bài đọc, điền F(False) trước câu có nội dung sai với nội dung bài đọc. Traditional Vietnamese customs and habits have been formed time to time for thousands of years. This creates a long – lasting culture. Despite the domination of Chinese and other powers, Vietnamese people still remains their unique cultural identity. In the course of development, customs and habits are indipensable spiritual field in Vietnamese culture. It is the original cultural values of the country strongly that define the identity and the long-lastingness of culture in Vietnam. In the entire history of Vietnam, Vietnamese culture is the combination of native culture, cultural exchange with China, Asian region and western countries. However, with a firm native culture, Vietnamese people keep their culture away from being assimilation, and “Vietnamizing” those cultural features instead. Vietnam culture is characterized by a series of unique customs and habits such as worshiping ancestors, chewing betel, and other customs in traditional ceremonies like funeral ceremony, long –life ceremony, etc. These customs and habits are associated with community of villages. Vietnam is a country of festivals, especially in spring. There are several famous festivals featuring Vietnamese culture like Tet Nguyen Dan, Tet Nguyen Tieu, Tet Han Thuc, Tet Doan Ngo, Mid-Autumn Festival, etc. Yet, customs and habits of Vietnamese people vary from region to region, and ethnic group to ethnic group. 1. Vietnam has a long –lasting culture. ______ 2. Due to the invasions of Chinese and other powers, Vietnamese people hardly remain their unique cultural identity. _______ 3. Vietnamese culture is the combination of many cultural components. ____ 4. Vietnamese people build their traditions partly by “Vietnamizing “foreign traditions. _________ 5. Vietnamese customs and habits are related to community of villages. _____ 6. In Vietnam, festivals are mostly held in spring. 7. In Vietnam, customs and habits of people are quite the same throughout the country. CỨU MÌNH CÁC BẠN ƠI MÌNH CẦN GẤP AI NHANH MÌNH VOTE 5* NHA

x^2-3x-4y^2+6y x^2-25y^2-6x+9 x^2-x+3-3x

Lm nha cảm ơn bạn nhớ nhanh nhanh cái mik nghĩ hơi dài lm hộ nha

Hãy đưa ra các biện pháp vệ sinh bảo vệ các cơ quan của cơ thể và đưa ra cách thức giáo dục hiệu quả nhất cho học sinh tiểu học

Ai giúp tui bài này với Please

x^2-3x-4y^2+6y x^2-25y^2-6x+9 x^2-x+3-3x