Giúp em giải bài 6 và bài 7 với ạ

Mọi người giúp mình câu 6 với ạ

điều kiện xác định một phân thức là gì ?

giải giúp mình mng ạ, tầm chiều nay nộp rồi

Một hình vuông có diện tích 1m vuông 44dm vuông. Cạnh hình vuông đó là: a.11 b.12 c.13 d.14

25< 5^n< 625 3.27 > 3^n ≥ 9 16 ≤ 8^n ≤ 64. Tìm số nguyên dương n

Bài 1 Tìm các sô nguyên x, biết -2 . (x+6) + 6 . (x - 10) = 8 -4 . (2x + 9) - (-8x + 3 ) - (x + 13) = 0 7x. (2 + x) - 7x . (x + 3) = 14 Bài 2 tìm số nguyên x thỏa mãn : |2x - 2| - 3x + 1 = -2 Bài 3 Tìm các số nguyên n biết : n + 1 là bội của n - 5.

giải pt : m - 3√m-1 = 1 ( căn của cả m - 1 )

1/ Đọc đoạn văn,chọn đáp án thích hợp nhất bên dưới: I live in a house near the sea. It is ...(1)... old house, about 100 years old and...(2)... very small. There are two bed rooms upstairs...(3)... no bathroom. The bathroom is down stairs ... (4)... the kitchen and there is a living room where there is a lovely old fire place. There is a garden...(5)... the house. The garden...(6)... down to the beach and in spring and summer...(7)... flowers every where. I like alone...(8)... my dog, Rack, but we have a lot of visitors. My city friends often stay with...(9)... I love my house for... (10)... reasons: the garden, the flowers in summer, the fee in winter, but the best thing is the view from my bedroom window. 1. A. a B. an C. the D. any 2. A. It's B. It C. there's D. They're 3. A. and B. or C. but D. too 4. A. between B. next C. near to D. next to 5. A. in front B. front of C. of front in D. in front of 6. A. go B. going C. goes D. in goes 7. A. these are B. they are C. there are D. those are 8. A. for B. of C. on D. with 9. A. me B. I C. my D. I'm 10. A. a B. any C. many D. a lot 2/ Read the passage and decide if the statements are True (T) or False (F). Miss Lien lives in a small house in Hanoi. She teaches English at a school there. She usually has breakfast at seven in the morning and she has lunch at twelve o'clock in the canteen of the school. She teaches her students in the morning. She teaches them dialogues on Wednesdays and Fridays. On Mondays, she teaches them grammar. In the evening, she usually stays at home and listens to music. She sometimes goes to the movie theatre. She always goes to bed at ten o'clock. 0. __F____ Miss Lien lives in a big house and teaches English at a school in Hanoi. 1. ______ She usually has breakfast at 7.30 in the morning and has lunch at home at 12 o'clock. 2. ______ She teaches her students dialogues on Mondays, Wednesdays and Fridays. 3. ______ She usually stays at home in the evening and goes to bed at 9. 4. ______ Sometimes she goes to the movie theatre. 3/ Đọc đoạn văn sau và viết chữ T vào câu đúng , chữ F vào câu sai : Quang is a gymnast. He is tall and thin. He has short black hair. His eyes are brown. He has a round face and thin lips . Quang is having dinner at the moment. He is eating fish. He often has fish , meat and vagetables for dinner. After dinner he eats bananas. Then he drinks orange juice . He feels full after dinner. ……. 1. Quang is a student. ……. 2. He is short and big. ……. 3. He has short hair. ……. 4. His hair is white . ……. 5. He has brown eyes . ……. 6. Quang’s face is round and his lips are full . ……. 7. He is having a bath now . ……. 8. He is eating vegetables . ……. 9. He often has dinner with fish , meat and vegetables. ……. 10. Quang feels hungry after dinner .

Tam giác ABC là đều. Gọi D E F là 3 điểm lần lượt nằm trên các cạnh AB BC CA sao cho AD=BE=CF a. CM: DB=EC b. Gọi O là giao điểm của DB và EC. CM: Tam giác OBC và tam giác ODE là các tam giác cân c. CM: DE//BC