Question

giúp mình với ạ 

 

Answer 1

b: \(\Leftrightarrow\dfrac{\sqrt{x}+1-\sqrt{x}}{\sqrt{x}\left(\sqrt{x}-2\right)}\cdot\left(\sqrt{x}-2\right)\left(\sqrt{x}-1\right)< \dfrac{1}{2}\)

=>\(\dfrac{\sqrt{x}-1}{\sqrt{x}}-\dfrac{1}{2}< 0\)

=>\(2\sqrt{x}-2-\sqrt{x}< 0\)

=>0<x<4

c: \(=1+x+\sqrt{x}+1-\sqrt{x}=2+x\)