Question

Cứu em cần gấp

Answer 1

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

b: Khi x=1/4 thì A=(-1/2-1):1/2=-3/2*2=-3

c: A=-3

=>căn x+1=3 căn x

=>căn x=1/2

=>x=1/4