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Hãy viết đoạn văn (khoảng 200 chữ) nêu suy nghĩ của bản thân về sức mạnh đoàn kết trong cuộc sống

Cho $\rm a \le b \le c$ , $\rm x \le y \le z $ .Chứng minh ax+by+cz $\ge$ bx+cy+az

Giúp với ạ!!!! Cảm ơn nhiều lắm lunnnnn á!!!!!

Lập bảng thống kê các phát minh quan trọng trong cách mạng công nghiệp Giúp vs lập bảng nha

Hãy tóm tắt truyện An Dương Vương Mị Châu Trọng Thủy

Giúp mình nhé Mình đang cần gấp

1. Relative clauses (mixed). where, when, who, which, why, whose 1. His next aim is to eliminate his opponent. His opponent seems stronger than him. 2. The reason is not persuasive. He is late for that reason. 3. The poem is lyrical and touching. She recited it. 4. He smiles at others. It is typical of him. 5. I left my hometown. I lived in that hometown during my childhood. 6. My Grandpa was born in 1945. The first World war broke out in that year. 7. My city lies on the Han River. It is famous for its bridges. giúp em với

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Cho tam giac abc vuông tại a đường cao ah, góc B=60', BH=3 cm. Tính AH,CH