Đáp án: 3(x-1/2) =(x-1/2) 27 - (l) 3( (x - (1/2)) ) = ( (x - (1/2)) )27 ⇒ (3/(x - (1/2))) = ((x - (1/2))/(27)) ⇒ (( (x - (1/2)) )^2) = 327 ⇒ (( (x - (1/2)) )^2) = 81 = (9^2) = (( ( - 9) )^2) ⇒ [ (l) x - (1/2) = 9 x - (1/2) = - 9 ⇒ [ (l) x = 9 + (1/2) x = - 9 + (1/2) ⇒ [ (l) x = ((19)/2) x = (( - 17)/2)

(l) 3( (x - (1/2)) ) = ( (x - (1/2)) )27 ⇒ (3/(x - (1/2))) = ((x - (1/2))/(27)) ⇒ (( (x - (1/2)) )^2) = 327 ⇒ (( (x - (1/2)) )^2) = 81 = (9^2) = (( ( - 9) )^2) ⇒ [ (l) x - (1/2) = 9 x - (1/2) = - 9 ⇒ [ (l) x = 9 + (1/2) x = - 9 + (1/2) ⇒ [ (l) x = ((19)/2) x = (( - 17)/2)

Nguyenthaitrucvy1273

3 năm trước

3:(x-1/2) =(x-1/2) :27

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maipham241

3 năm trước

$\begin{array}{l} 3:\left( {x - \dfrac{1}{2}} \right) = \left( {x - \dfrac{1}{2}} \right):27\\ \Rightarrow \dfrac{3}{{x - \frac{1}{2}}} = \dfrac{{x - \frac{1}{2}}}{{27}}\\ \Rightarrow {\left( {x - \dfrac{1}{2}} \right)^2} = 3.27\\ \Rightarrow {\left( {x - \dfrac{1}{2}} \right)^2} = 81 = {9^2} = {\left( { - 9} \right)^2}\\ \Rightarrow \left[ \begin{array}{l} x - \dfrac{1}{2} = 9\\ x - \dfrac{1}{2} = - 9 \end{array} \right. \Rightarrow \left[ \begin{array}{l} x = 9 + \dfrac{1}{2}\\ x = - 9 + \dfrac{1}{2} \end{array} \right. \Rightarrow \left[ \begin{array}{l} x = \dfrac{{19}}{2}\\ x = \dfrac{{ - 17}}{2} \end{array} \right. \end{array}$