Cho:

\(A=\left(\dfrac{x+2}{x\sqrt{x}-1}+\dfrac{\sqrt{x}}{x+\sqrt{x}-1}+\dfrac{1}{1-\sqrt{x}}\right):\dfrac{\sqrt{x}-1}{2}\)

a,Rút gọn A

b,Tìm x \(\in\)Z để \(A\in Z\)

Cho:

\(P=\dfrac{10\sqrt{x}}{x+3\sqrt{x}+4}-\dfrac{2\sqrt{x}-3}{\sqrt{x}+4}+\dfrac{\sqrt{x}+1}{1-\sqrt{x}}\)

a,Rút gọn

b,Chứng minh: P > -3

c,Tìm GTLN của P

Cho:

\(A=\dfrac{x\sqrt{x}+26\sqrt{x}-19}{x+2\sqrt{x}-3}-\dfrac{2\sqrt{x}}{\sqrt{x}-1}+\dfrac{\sqrt{x}-3}{\sqrt{x}+3}\)

a,Rút gọn

b,Tìm GTLN của A

Cho:

\(P=\dfrac{3\left(x+\sqrt{x}-3\right)}{x+\sqrt{x}-2}+\dfrac{\sqrt{x}+3}{\sqrt{x}+2}+\dfrac{\sqrt{x}-2}{1-\sqrt{x}}\)

a,Rút gọn P

b,Tìm x để P<\(\dfrac{15}{4}\)

c,Tìm GTLN của P

Change these yes-no question into passive voice:

1. Nothing can change my mind

->

2. No one had told me about it

->

3.They can't make tea with cold water

->

4.You mustn't use this machine after 5:30 p.m

->

5.Must we finish the test before ten?

->