Tỉ số OA OB
Criado em: 11 de janeiro de 2025
Criado em: 11 de janeiro de 2025
Trong hệ trục tọa độ oxyz cho tam giác abc vuông tại a có a thuộc tia ox thuộc tia oy và trọng tâm tam giác ABC thuộc tia oz tính tỉ số OA/OB
Giả sử hệ trục tọa độ với là gốc tọa độ. Theo giả thiết:
Vì là trọng tâm nên:
Thay tọa độ ta có:
Do nằm trên , nên hoành độ và tung độ của bằng 0:
Vậy với là một số thực chưa xác định.
Tiếp theo, tam giác vuông tại nên:
Tính các véc-tơ:
Tích vô hướng:
Điều kiện vuông tại cho ta:
Cuối cùng, độ dài và .
Tỉ số cần tìm:
Viết một bài báo cáo khoảng 180 đến 200 từ về những lợi ích và bất lợi của robot làm việc nhà bằng tiếng Anh
Benefits and Drawbacks of Household Robots
Household robots have increasingly become a staple in modern homes, offering a range of benefits that enhance daily living. One significant advantage is the automation of mundane tasks such as cleaning, cooking, and lawn maintenance. This automation not only saves time but also allows individuals to focus on more meaningful activities or work. Additionally, robots equipped with smart technology can improve efficiency through precise and consistent performance, reducing the likelihood of human error. For families with elderly members or individuals with disabilities, household robots provide invaluable assistance, promoting independence and safety.
However, the integration of robots into home environments also presents certain drawbacks. The initial cost of purchasing and maintaining advanced robotic systems can be prohibitive for many households. Moreover, there is a learning curve associated with operating these devices, which may deter some users. Privacy concerns arise as robots often rely on data collection and internet connectivity, potentially exposing personal information to security risks. Additionally, the reliance on robots for everyday tasks might lead to a decrease in human interaction and physical activity, impacting social skills and overall health.
In conclusion, while household robots offer significant benefits in terms of efficiency, convenience, and support, it is essential to consider the associated costs, privacy issues, and potential impacts on human behavior. Balancing these factors will determine the extent to which robots can be effectively and sustainably integrated into our homes.
Viết ngắn gọn hơn
Benefits and Drawbacks of Household Robots
Household robots offer numerous advantages that enhance daily life. They automate tasks like cleaning, cooking, and lawn care, saving time and allowing people to focus on more important activities. Smart robots can perform tasks consistently and efficiently, reducing errors. For families with elderly members or individuals with disabilities, these robots provide essential assistance, promoting independence and safety.
However, there are also disadvantages to consider. The initial cost of purchasing and maintaining household robots can be high, making them inaccessible for some families. Operating these devices may require technical knowledge, which can be a barrier for some users. Privacy concerns arise as robots often collect data and connect to the internet, posing potential security risks. Additionally, excessive reliance on robots for daily tasks might reduce physical activity and human interaction, potentially impacting health and social skills.
In summary, while household robots offer significant benefits in terms of efficiency and support, it is important to address the costs, privacy issues, and possible effects on human behavior to ensure their effective integration into homes.