so sánh chế phẩm virus và chế phẩm nấm trừ sâu

TÌM SỐ NGUYÊN X THỎA MÃN : a)(x-2).(x-4)<0 b)(x +2 ). (3-x) . ( $x^{2020}$ - 1)>0 có giải thích , đáp án đúng = 5* , c.ơn , hay nhất :> zúp mik zới ;-;

Giúp mình với ah. Vote 5*+CTLHN

giải dùm mình bài 4 5 nhé! <3

Viết chương trình tính tổng: S = 1/1+1/2+1/3+...+1/n với giá trị n nhập vào từ bàn phím?

Giúp mình câu 3,4,5 với( bỏ câu 2 nha)

Giúp mình làm câu 3 với, cảm ơn

1. You .... on Tuesday. You ..... on Wednesday A. Dont arrive / arrived B. Didnt arrive / arrives C. Didnt arriving / arrived D. Didnt arrive / arrived 2. He asked me ..... I was a student A. If B. Who 3. He .... me whether I came from A. Told B. Asked C. Said D. Required 4. We couldnt buy anything because .... of the shops were open A. None B. All C. No one D. Nothing 5. He is lazy. He never does ..... work A. Some B. No C. Any D. Not

Tính các tổng sau: 1, -1 + 3 - 5 + 7 - ....- 53 + 55 2, 1 - 4 + 7 - .... + 331 - 334 3, 1 + 3 + 3^2 + 3^3 +.... + 3^2021

1. We should use cloth bags ________________ of plastic bags. A. instead B. besides C. apart D. without 2. In the world, millions of old papers ________________ away every day. A. thrown B. are throwing C. are thrown D. threw 3. She was very sad ________________ good marks in the final test. A. not get B. not to get C. to not get D. not getting 4. The prefix “re-” in the word “reuse” means ________________ A. against B. for C. no D. again 5. Farmers collect household and garden waste to make ________________. A. compost B. floor coverings C. glassware D. pipes 6. My house ________________ every year to welcome the Tet Holiday. A. paints B. painted C. is painted D. painting 7. Students should be eager ________________ in social activities. A. participate B. to participate C. to participating D. participated 8. Milk bottles can be ________________ after being cleaned. A. recycled B. thrown away C. broken D. reused 9. This project ________________ out next month. A. is carried B. will carry C. will be carried D. carries 10. It’s dangerous ________________ in this river. A. swim B. to swim C. swimming D. swam