Question

số x dương mà x/3 = 3/4x

Answer 1

\(\dfrac{x}{3}=\dfrac{3}{4x}\Leftrightarrow4x^2=9\Leftrightarrow x^2=\dfrac{9}{4}\Leftrightarrow x=\dfrac{3}{2}\left(x>0\right)\)

Answer 2

Ta có : 

`x/3=3/(4x)``=>4x.x=3.3``=>4x^2=9``=>x^2=9/4``=>x=3/2`

Answer 3

Cho hỏi là \(\dfrac{x}{3} = \dfrac{3}{4x} hay \dfrac{x}{3} = \dfrac{3}{4}x\)

Nếu là cái thứ nhất: \(\dfrac{x}{3} = \dfrac{3}{4x}\)

=> 4xx = 3.3

=> 4x² = 9

=> x² = \(\dfrac{9}{4} \)= 2,25 => x =\(\sqrt{2,25}\)= 1,5