1: \(P=\dfrac{x+\sqrt{x}-x-2}{\sqrt{x}+1}:\dfrac{x-\sqrt{x}+\sqrt{x}-4}{x-1}\)
\(=\dfrac{\sqrt{x}-2}{\sqrt{x}+1}\cdot\dfrac{x-1}{x-4}=\dfrac{\sqrt{x}-1}{\sqrt{x}+2}\)
Thay x=49 vào P, ta được;
\(P=\dfrac{7-1}{7+2}=\dfrac{6}{9}=\dfrac{2}{3}\)
2: \(P-1=\dfrac{\sqrt{x}-1-\sqrt{x}-2}{\sqrt{x}+2}=\dfrac{-3}{\sqrt{x}+2}< 0\)
=>P<1