Question

Answer 1

6:

a: =>x-1<0

=>x<1

b: =>\(\dfrac{\sqrt{x}+1}{\sqrt{x}-2}-\dfrac{1}{3}< 0\)

=>\(\dfrac{3\sqrt{x}+3-\sqrt{x}+2}{3\left(\sqrt{x}-2\right)}< 0\)

=>(2căn x+5)/3(căn x-2)<0

=>căn x-2<0

=>0<x<4

c; =>\(\dfrac{\sqrt{x}+3-2\sqrt{x}+4}{\sqrt{x}-2}>0\)

=>\(\dfrac{-\sqrt{x}+7}{\sqrt{x}-2}>0\)

=>\(\dfrac{\sqrt{x}-7}{\sqrt{x}-2}< 0\)

=>2<căn x<7

=>4<x<49

d: =>căn a-5>=0

=>a>=25