Tìm Giá Trị Lớn Nhất Của đa thức S = $4x-2x^2+1$

Rep Nhanh giúp mik với plz

Trong tự nhiên nguyên tố clo có 2 đồng vị là  17 Cl và 37 17  có nguyên tử khối trung binh của clo là 35,5. Số nguyên tử của đồng vị 37 17 Clo trong 3,65 gam HCI là (với PTK của HCI = 36,5) là 

A. 2,138.104. B. 2,831.104. D. 1,505.10. 

1. Gina helps her parents ___________ vegetables on the street.

A. sell B. selling C. buying

2. In the afternoon she goes to school ___________ at 12 p.m.

A. on bus B. with bus C. by bus

3. I have ___________ my dog every day.

A. to feed B. feed C. feeding

4. What time ___________ the quiz show start?

A. do b. does C. doing

5. My sister enjoys ___________ badminton in her free time.

A. play B. playing C. to play

6. I have to wash ___________ after dinner.

A. the dishes B. the chores C. meal

Tìm số tự nhiên x, biết rằng: b)(x + 5):(x +1)

c)(x +14):(x - 3)

tìm tất cả các số nguyên x để cách phân số sau có gá trị là số nguyên

a) a = x+1/x-2   (x ko thuột 2)

b) b = 2x-1/x+5 (x ko thuột -5)

c) c + 10x-9/2x-3 

kể lại trải nghiệm đáng nhớ của em về người bạn thân

II. Choose the best reply from List B for each question in List A. ((3.0pts)

List A:

1. Was there anything good on TV last night?

2. What was it called?

3. What was it about?

4. What was so special about it?

5. Really? What time was it on?

6. I’m sorry. I missed it. Is there going to be another chance to see it?

List B:

A. It was all about gorillas and the way they live.

B. It was just so interesting and the photography was excellent.

C. Yes, it’s going to be repeated next Sunday.

D. Yes, there was an interesting nature programme.

E. “The Gentle Giant”

F. From seven to eight.