Cho biểu thức 

A=\(\left(\dfrac{\sqrt{x}+3}{1-x}-\dfrac{3}{1-\sqrt{x}}\right):\left(1-\dfrac{1}{x-1}\right)\) với \(x\ge0,x\ne1\)

a,Rút gọn A

b,Tính B khi x =\(7+4\sqrt{3}\)

c,Tìm x để M<0

Cho biểu thức

A=\(\left(\dfrac{1-x\sqrt{x}}{1-\sqrt{x}}+\sqrt{x}\right)\dfrac{1}{\sqrt{x}+1}\) với \(x\ge0\),\(x\ne1\)

a,Rút gọn A

b, Tìm x để A<2

Rút gọn

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

Rút gọn

A=\(\left(\dfrac{\sqrt{x}+3}{1-x}-\dfrac{3}{1-\sqrt{x}}\right):\left(1-\dfrac{1}{x-1}\right)\)

Rút gọn

\(\left(\dfrac{\sqrt{x}+3}{1-x}-\dfrac{3}{1-\sqrt{x}}\right):\left(1-\dfrac{1}{x-1}\right)\)

Rút gọn

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

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