1- comes
2- came/ had left
3- has never flown
4- have just decided / would undertake
5- would take
6- was
7- am attending / was attending
8- arrive / will be waiting
9- had lived
10- got / had already arrived
11- will see / see / will have graduated
12- visited / was
1. comes
2. came - had left
3. has never flow
4. have just deicded - would undertake
5. would take
6. was
7. am attending - was attending
8. arrives - will be waiting
9. had lived
10. got - had laready arrived
11. ?
12. have visited - was
tìm x (2/11.13+2/13.15+....+2/19.21).462-[0,04:(x+1,05)]:0,12=19
cho tam giác ABC vuông tại A biết AB=6a;AC=8a a/dựng vectơ v=vectơAB+vectơAC b/tính |vectơ v|
Cho a là nghiệm dương của phương trình 2^2x+3 – 33.2^x + 4 = 0. Khi đó giá trị của M = a² + 3^a – 7 là
6. Tính giá trị biểu thức x³ + 3xy + y³ biết x+y = 1
đặt 2 câu với từ make a difference, mural
5. Xác định a sao cho ( 10x² - 7x + a ) chia hết cho ( 2x - 3 )
phân tích đa thức thành nhân tử( DÙNG PP BỔ SUNG HẰNG ĐẲNG THỨC) a) 4x^2-7x-2 B) 4x^2+5x-6 C) 4x^2+15x+9 D) 2x^2- 3x-2 Giúp mình nha, dùng pp bổ sung hằng đẳng thức giúp mình !! Cảm ơn nhiều !
4. Tình các cặp số (x , y ) ; x , y ∈ z thỏa mãn đẳng thức a) x + y = xy b) 5xy - 2y² - 2x² = -2
chứng minh với mọi số nguyên n thì : a) ( $n^{2}$ + 3n - 1 ) ( n + 2 ) - $n^{3}$ + 2 chia hết cho 5 b) ( 6n + 1 ) ( n + 5 ) - ( 3n + 5 ) ( 2n - 1 ) chia hết cho 2
Bài 4: Điền giới từ thích hợp 24. He is the president ...................... our club. 25. She spends most ...............the time ............. the couch .......... front ....... the TV. 26. What do you usually do ............. school? 27. Why don't you come ............. .? 28. They swap cards .......... their friends. 29. Will you play a game ................ . catch? 30. What do you do ................ . recess? 31. They usually have portable CD player ................ small earphones. 32. I'll take part................ your club. 33. They read or study ............. the same time. 34. We enjoy all ..................... our classes. 35. ............. school we study many things. 36. ............. . history, we study past and present events.......... . Vietnam and .........the world. 37. ............. . physics, we learn ............how things work. 38. She learns how to use a computer .......... . her Computer Science class. 39. Newspapers are .......... the racks ................ the middle. 40. Math books are ................ . the shelves .......... . the left. 41. The largest library is ..................Washington D. C, the capital .......... the USA. 42. Those books .......... the back ............the libraries are .........English. 43. Now, come and look ...............the kitchen. 44. My uncle is ............. . work now. 45. Can I see the rest .........the house? 46. She'll have a party .......... . her birthday.
Loga.vn - Cộng Đồng Luyện Thi Trực Tuyến
