Question

 

tìm x: 2√x
=1

Answer 1

ĐKXĐ: x>=0

\(2\sqrt{x}=1\)

=>\(\sqrt{x}=\dfrac{1}{2}\)

=>\(x=\left(\dfrac{1}{2}\right)^2=\dfrac{1}{4}\left(nhận\right)\)

Answer 2

ĐKXĐ:`x>=0`

`2sqrt x=1`

`<=>sqrt x = 1/2`

`<=>(sqrt x)^2=(1/2)^2`

`<=>x=1/4`(thỏa mãn)

Vậy...