Đáp án+Giải thích các bước giải:
`a) P(-1)=-m-3=2`
`⇔ -m=5 ⇔ m=-5`
`b) Q(x)=-2x²+mx-7m+3`
`⇒ Q(-1)=-2.(-1)²-m-7m+3`
`= 1-8m=0`
`⇒ 8m=1 ⇒ m=1/8`
Câu IX: Hoàn chỉnh câu thứ hai sao cho không thay đổi nghĩa so với câu đã cho: 1. I sent my friend a letter in London last week. => A letter……………............…............…………………………………………………… 2. "Eat more fruits and vegetables every day", the doctor said to her. =>The doctor told……………...........…............………………………………………………… 3. The girl was injured in the accident. She is now in the hospital. => The girl………………............…............…………………………………………………… 4.The girl was so beautiful that everyone admired her. => It was such…………………......…............…………………………………………………. 5. The weather is bad, so we can’t go camping. =>If the weather………………............…............……………………………………...……… 6. He was punished because he behaved badly. => Because of…………………......…............…………………………………………………
Exercise 5: HÃY VIẾT LẠI CÁC CÂU SAU CÓ NGHĨA KHÔNG ĐỔI VỚI CÂU ĐÃ CHO, SỬ DỤNG TỪ TRONG NGOẶC. 1. Although Nam is not an intelligent student, he can learn very fast. (In spite of ) ……………………………………………………………………………………………. 2. Because Hoa was rich, she could buy that house. (Because of ) ……………………………………………………………………………………………. 3. Although he has a physical handicap, he has become a successful business man. (Despite ) ……………………………………………………………………………………………. 4. Despite her unkind behavior, we still love her. (Although) ……………………………………………………………………………………………. 5. Though she is poor, she lived very happily. (In spite of ) ……………………………………………………………………………………………. 6. The sun shone brightly. Maria had to put on her sunglasses. (so…..that) ……………………………………………………………………………………………. 7. Dean was a powerful swimmer. He always won the race. (such…that) ……………………………………………………………………………………………. 8. He was very sick. He was sent to the hospital. . (so…..that) ……………………………………………………………………………………………. 9. David has a lot of work to do. He can’t come tonight. (so…..that) …………………………………………………………………………………………… 10. This is a good film. I want to see it again and again. (such…that) ……………………………………………………………………………………………. 11. Because the rain was so heavy, I couldn't go to school. (Because of ) ……………………………………………………………………………………………. 12. Although it was raining heavily, we still went to school. (Despite ) ……………………………………………………………………………………………. 13. Because I studied hard, I passed the exam. (Because of ) ……………………………………………………………………………………………. 14. He is so young. His acting is excellent. (Although) ……………………………………………………………………………………………. 15. It was noisy. The children slept well. (Despite) …………………………………………………………………………………………… 16. All critics said this film is really boring. I was so interested in it. (Nevertheless) ……………………………………………………………………………………… 17. The film poster is fascinating. I don't want to see this film. (In spite of) …………………………………………………………………………………… 18. She prepared carefully for the casting. She wasn't chosen. (However) ……………………………………………………………………………………………. 19. Although our plan is careful, we made some mistakes. (Despite) ……………………………………………………………………………………………. 20. Because of your dirty room, I feel uncomfortable. (Because) ……………………………………………………………………………………………. 21. He is so clever that he can answer all my questions. (such…that) ……………………………………………………………………………………………. 22. Because I am on diet, I cannot eat hamburger or fried chicken. (so) ……………………………………………………………………………………………. 23. She came to work late because she was stuck in the traffic. (Therefore) …………………………………………………………………………………………….
giúp mình bài này với,mình cần gấp ạ! mình cảm ơn!
trình bày bài học rút ra từ câu chuyện Bài học đường đời đầu tiên
98.37 999.201 Vận dụng tính chất
Tìm nghiệm của các đa thức sau : m(x) = x^2 + 7x - 8 n(x) = 5x^2 + 9x + 4
giải giúp mình bài này với mn ui
MN lm nhanh giúp em với ạ em cảm ơn
Hãy viết đoạn văn nghị luận khoảng 2/3 trang giấy trình bày suy nghĩ của em về suy nghĩ của em về ý nghĩa lòng khoan dung trong cuộc sống
Đề 1: 1. Tính : ( 2a – b)(4a2 + 2ab + b2). 2. Rút gọn và tính giá trị biểu thức: 3. Tìm x, biết : (3x + 2)(x – 1) – 3(x + 1)(x – 2) = 4 4. Tìm hệ số của x4 trong đa thức: P = ( x3 - 2x2 +x – 1)( 5x3 – x). Đề 2: 1. Chứng minh: với a = - 3,5 giá trị biểu thức bằng – 29. 2. Chứng minh rằng biểu thức sau không phụ thuộc vào x: 3. Biết (x – 3)(2x2 + ax + b) = 2x3 – 8x2 + 9x – 9 Tìm a,b. Đề 3: 1. Tính : a./ (2 + x)(2 – x)(4 + x2) b./ ( x2 – 2xy + 2y2)(x – y)(x + y) 2. Tìm x,biết : x(x – 4) – ( x2 - 8) = 0 3. Tìm m sao cho: 2x3 – 3x2 + x + m = (x + 2)(2x2 – 7x + 15). Đề4: 1. Rút gọn : A = ( 5x – 1)(x + 3) – ( x – 2)(5x – 4) B = (3a – 2b)( 9a2 + 6ab + 4b2). 2. Chứng minh biểu thức : n( 2n – 3) – 2n( n + 2) luôn chia hết cho 7,với mọi số nguyên n. 3. Biết : x4 – 3x +2 = ( x – 1)(x3 + bx2 + ax – 2).
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