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toán thi sáng hôm nay ạ

bài trong đề thi hsg huyện Kim Thành ,trường THCS phú thái năm 2022-2023 Cho đường tròn (O; R) đường kính BC, A là điểm thay đổi trên đường tròn (O; R). Kẻ AH vuông góc với BC ( H thuộc BC). Gọi (Q; r); (I; r1); (K; r2) là các đường tròn nội tiếp tam giác ABC, AHB, AHC. Đường thẳng KI cắt AB và...

Tìm nghiệm nguyên của PT: 5x^2 + 5y^2 + 6xy - 20x - 20y + 24 = 0

Giải hệ pt \left\{\begin{matrix}\dfrac{x^2}{(y+1)^2}+\dfrac{y^2}{(x+1)^2}=\dfrac{1}2\\3xy=x+y+1\end{matrix}\right. mọi người có thể tra bài này trên qanda hộ em đc ko ạ

mọi người có thể tra bài này trên qanda hộ em đc ko ạ Cho a;b là các số nguyên thỏa mãn: 2a^2 + 3ab + 2b^2 chia hết cho 7 CMR: a^2 - b^2 chia hết cho 7

Tính GTBT P=\dfrac{4(x+1)x^{2022}-2x^{2021}+2x+1}{2x^2+3x} tại x=\sqrt{\dfrac{1}{2\sqrt3-2}-\dfrac{3}{2\sqrt3+2}} mọi người có thể tra bài này trên qanda hộ em đc ko ạ

21. They were quite excited ....... the match. 22. We weren't very impressed ........ his appearance. 23. I was very angry ....... them ......... making so much noise. 24. He felt sorry ...... the children. 25. The letter Ba wrote was full ....... mistakes. 26. My town is famous ...

1/ I saw ....... accident this morning. ...... car crashed into .... tree. ...... driver of ..... car wasn't hurt but .... car was badly damaged. 2/ It's ....... beautiful day. Let's sit in ....... garden. 3/ We had ....... dinner in ..... most expensive restaurant in town. 4/ Do you often...

40. I don't care ....... the cost of the holiday. 41. I'm glad you reminded me ....... his birthday. 42. This house reminds me ..... the one I live in when I was small. 43. We warned our children ......... the fierce dog. 44. They complained ....... their neighbour ..... his naughty son...

21. They were quite excited ....... the match. 22. We weren't very impressed ........ his appearance. 23. I was very angry ....... them ......... making so much noise. 24. He felt sorry ...... the children. 25. The letter Ba wrote was full ....... mistakes. 26. My town is famous ...

11. Ken showed me a photo ........ the house where he used to live. 12. I was delighted ....... the present you gave me. 13. It was very nice ...... you to do the shopping for me. 14. They didn't reply to my letter, which was very impolite ....... them. 15. We enjoyed our holiday, but we...

1/ I saw ....... accident this morning. ...... car crashed into .... tree. ...... driver of ..... car wasn't hurt but .... car was badly damaged. 2/ It's ....... beautiful day. Let's sit in ....... garden. 3/ We had ....... dinner in ..... most expensive restaurant in town. 4/ Do you often...

1.There are some differences .......... British and American English 2. Money isn't a solution ....... every problem. 3. There has been an increase .......... the amount of traffic on that road. 4. There are many advantages ........ being able to speak a foreign language. 5. What was Emma's...

cho em hỏi ý b thôi ạ

điiền giới từ 32. I'm sorry. It was an accident. I didn't do it .... purpose. 33. - Did you enjoy your holiday ? - Not every minute, but .... the whole, yes. 34. Workers at the factory have gone ..... strike ...... better pay and conditions. 35.I think she should go ........ a diet. 36. In...

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