Question

tap hop cacso nguyen x thoa man x=\(\sqrt{x}\)

Answer 1

\(x=\sqrt{x}<=>x-\sqrt{x}=0=>x\left(\sqrt{x}-1\right)=0=>x=0;\sqrt{x}=1=>x=1\)

vây x E {0;1}

Answer 2

x = {0;1} chắc chắn 100%

Answer 3

$x=\sqrt{x}<=>x-\sqrt{x}=0=>x\left(\sqrt{x}-1\right)=0=>x=0;\sqrt{x}=1=>x=1$

Answer 4

                                                                           x=\(\sqrt{x}\)

x=\(\sqrt{x}\) \(\Rightarrow\) x \(\notin\) \(Z^-\)

x=\(\sqrt{x}\)\(\Rightarrow\)\(x^2=x\)

Ta suy ra x=0;1