Question

Mn giúp vs ạ!! Minhd cần gấp.

Answer 1

1: \(A=\dfrac{x-4}{\sqrt{x}\left(\sqrt{x}+2\right)}:\dfrac{\sqrt{x}+1}{\sqrt{x}}=\dfrac{\sqrt{x}-2}{\sqrt{x}}\cdot\dfrac{\sqrt{x}}{\sqrt{x}+1}=\dfrac{\sqrt{x}-2}{\sqrt{x}+1}\)

2: căn x-2<căn x+1

=>A<1

3: A=1/4

=>căn x-2/căn x+1=1/4

=>4 căn x-8=căn x+1

=>3 căn x=9

=>x=9