P=$\frac{2}{x+\sqrt{x}+1}$
Chứng minh rằng P>0, x khác 1

$\frac{-\left(\sqrt{x}-1\right)}{x+\sqrt{x}+1}$Tìm giá trị x để P bé hơn hoặc bằng 0

P= $\frac{a+\sqrt{a}+a}{\sqrt{a}-1}$
Tìm giá trị của a để P<1

P=$a-\sqrt{a}-2$
Tìm a để P=2

Tìm x
$\sqrt{4-5x}$=12
Giúp mk vs ạ

hảy kể lại 1 việc là khiến em ân hận nhất

2.3+4.6

Question 1: Nga had just arrived home and there was a knock at the door.

A. Not only did Nga just arrive home but there was also a knock at the door.

B. No sooner had Nga just arrived home when there was a knock at the door.

C. Had it been for Nga's arrival home, there wouldn't have been a knock at the door.

D. Scarcely had Nga arrived home when there was a knock at the door.

Question 2: Chris said that it was Rosa who had left the door unlocked.

A. Rosa was accused of having left the door unlocked.

B. Chris offered that Rosa was the one having left the door unlocked.

C. Chris blamed Rosa for leaving the door unlocked.

D. Chris warned Rosa about having left the door unlocked.

Question 3: The anandamide found in chocolate breaks down more quickly than the anandamide found in the brain.

A. The anandamide found in chocolate breaks down the quickest compared to the anandamide found in the brain.

B. The anandamide found in chocolate breaks down a lot quicker than the anandamide found in the brain.

C. The more quickly the anandamide found in chocolate breaks down, the more slowly the anandamide found in the brain.

D. The anandamide found in chocolate breaks down the most quickly among all the anandamides found in the brain.

Cho đường tròn (O; 2cm) bán kính OB. Vẽ dây AC sao cho OBC = 60 . Trên tia OB lấy điểm M sao cho BM = 2cm. Tính độ dài MC.

giúp toi vsssss

2300 dam2 + 1750 dam2 - 255 dam2 + 77 hm2 - 495 dam2

 Chỉ ra và nêu tác dụng của biện pháp tu từ được sử dụng trong câu sau:

“Những giọt mật trào ra, gặp lửa tạo ra một thứ hương thơm chết người, nhất là khi trời lại lành lạnh thế này.”?