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Giúp em mấy câu trắc nghiệm với mn

Chứng minh bằng phương pháp phản chứng: nếu n chia hết cho 3 thì n(n+1) chia hết cho 6

GIẢI GIÚP EM BÀI NÀY EM CẦN GẤP LẮM Ạ!!!

ai giải thich s giúp e chỗ x bình - y bình chia 4 ra số dư vậy ko? Giups e vsssssssssssss

Viết lại câu 1. It was such cold weather that we couldn't go out. - The weather was too______________________________ - The weather was so_______________________________ - The weather wasn't_______________________________ 2. It is such an interesting film that many people see it. - The film is so______________________________________ 3. It was too hazy a day for us to take any pictures. - The day was_____________________________________ 4. Peter is too young to take part in the club - Peter is so________________________________________ - Peter isn't_______________________________________

Tìm GTNN: A= (x+1)(x+2)(x+3)(x+4)-32 B= x^2-2xy+y^2+3x-3y+1 C=4x^2+1/x^2-20 (x>0)

Bài 1: tìm nghiệm nguyên của phương trình: 1) x + y = xy 2) p(x + y) = xy với p nguyên tố Bài 2: Phân tích thành nhân tử: A = ab(a - b) + b(b - c) + ca(c - a)

So sánh: a) A= 100^20-1/ 100^21-98 B= 100^19-1/ 100^20-98

MN VÀO GIÚP EM VỚI Ạ . CHIỀU NAY EM ĐI HỌC RỒI Đề bài: Combine the sentences. Use the words in blankets: 1. Classical music is interesting. Folk music is interesting ( as.... as) ______________________________________________________________________ 2. This picture is 800000 VND. That picture is 600000 VND (price.... different) ______________________________________________________________________ 3. Mr. Brown speaks English. Mrs. Kent speaks English (same language) ______________________________________________________________________ 4. John didn't go to concert show last night ( either) ______________________________________________________________________ 5. Mr. Phong teaches history of arts. Mrs. Ha teaches history of music ( same subject) ______________________________________________________________________