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buivietha
2 năm trước
Cho a,b,c ∈ N* thỏa mãn a/b = b/c . CMR a^3 - 2b^3 + c^3 / a+b+c ∈ Z
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1. Nam forgot to take his raincoat, so he got wet. A. Nam got wet; however, he forgot to take his raincoat. B. Nam got wet although he forgot to take his raincoat. C. Nam got wet because he forgot to take his raincoat. D. Nam got wet, so he forgot to take his raincoat. 2. The weather was cold. We went swimming. A. Although the weather is cold, we went swimming. B. Although the weather was cold, but we went swimming. C. Because the weather was cold, we went swimming. D. Despite the cold weather, we went swimming. 3. The artisan moulded the clay. He could make a mask. A. The artisan moulded the clay because he could make a mask. B. The artisan moulded the clay so he could make a mask. C. Because the artisan moulded the clay, he could make a mask. D. The artisan moulded the clay so that he could make a mask. 4. We didn’t go out because of the heavy rain. A. We didn’t go out because it rained heavily. B. We didn’t go out because of it rained heavily. C. We didn’t go out because it didn’t rain heavily. D. We didn’t go out because it rained heavy. 5. Although it was raining heavily, we still went to school. A. Despite of being rain heavily, we still went to school. B. Despite being rain heavily, we still went to school. C. Despite the heavy rain, we still went to school. D. Despite it rains heavily, we still went to school. 6. He was sick. He had to stay at home. A. He was sick because he had to stay at home. B. Because he was sick, he had to stay at home. C. He had to stay at home, so he was sick. D. Because he was sick, so he had to stay at home. 7. Steven felt unwell, but he went on working. A. Though he felt unwell, but Steven went on working. B. In spite of feeling unwell, Steven went on working. C. Steven went on working despite he felt unwell. D. Steven went on working although feeling unwell. 8. We stopped playing tennis because it started to rain. A. It started to rain, so we stopped playing tennis. B. It started to rain because we stopped playing tennis. C. It started to rain; however, we stopped playing tennis. D. It started to rain, and we stopped playing tennis. 9. He wore dark glasses so that he could avoid being recognized. A.He wore dark glasses in order that avoid being recognized. B. He wore dark glasses so as avoid being recognized. C. He wore dark glasses in order to he could avoid being recognized. D. He wore dark glasses in order to avoid being recognized. 10. He refused my invitation to my birthday party because he was busy. A. He turned on my invitation to my birthday party because he was busy. B. He turned off my invitation to my birthday party because he was busy. C. He turned down my invitation to my birthday party because he is busy. D. He turned down my invitation to my birthday party because he was busy. 11. This hand-embroidered picture was expensive. We bought it. A. In spite of this hand-embroidered picture was expensive, we bought it. B. Despite this hand-embroidered picture was expensive, we bought it. C. Although this hand-embroidered picture was expensive, we will buy it. D. Even though this hand-embroidered picture was expensive, we bought it. 12. This is called a Chuong conical hat. It was made in Chuong village. A. This is called a Chuong conical hat so that it was made in Chuong village. B. This is called a Chuong conical hat since it was made in Chuong village. C. This is called a Chuong conical hat although it was made in Chuong village. D. This is called a Chuong conical hat when it was made in Chuong village. CÁC BẠN LÀM VÀ GIẢI CHI TIẾT GIÚP MÌNH VS Ạ

Phép cộng hai ma trận có cùng kích thước , ma trận tổng có kích thước , phần tử đứng ở hàng thứ , cột thứ xác định bởi: Phép nhân hai ma trận chỉ thực hiện được khi số cột của ma trận bên trái bằng số dòng của ma trận bên phải. Nếu ma trận có kích thước và ma trận có kích thước , thì ma trận tích có kích thước , phần tử đứng ở hàng thứ , cột thứ xác định bởi: Phép nhân ma trận có các tính chất sau:  Tính chất kết hợp: ( ) ( );  Tính chất phân phối: ( ) ( ) ; Cần chú ý rằng phép nhân ma trận không giao hoán. Ví dụ, ( ) ( ) ( ); ... ( ) Yêu cầu: Cho ma trận kích thước và số nguyên dương , hãy tính . Input - Dòng đầu chứa hai số nguyên ( ); - dòng tiếp theo, mỗi dòng chứa số nguyên. Output - Gồm dòng, mỗi dòng số mô tả ma trận , vì giá trị mỗi phần tử của ma trận có thể rất lớn, do đó chỉ cần đưa ra chữ số cuối cùng của từng phần tử của ma trận .

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