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Toán Lớp 7: giups minhf voi timf x 1/2x-1=2x-1/1

Home/ Toán Lớp 7: giups minhf voi timf x 1/2x-1=2x-1/1

Toán Lớp 7: giups minhf voi timf x 1/2x-1=2x-1/1

Audrey Tháng Tám 28, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: giups minhf voi timf x
1/2x-1=2x-1/1

Comments ( 2 )

ngocbichchau
28 Tháng Tám, 2022 at 9:40 sáng

Reply

$\dfrac{1}{2x-1}$ =$\dfrac{2x-1}{1}$

⇒1=2x-1 . 2x-1

⇒1=2.(2x-1)

⇒1.2=2x-1

⇒2x-1=2

⇒2x=2+1

⇒2x=3

⇒x=$\dfrac{3}{2}$
kymmailien
28 Tháng Tám, 2022 at 9:40 sáng

Reply

1/(2x-1) = (2x-1)/1

(2x-1).(2x-1)=1.1

(2x-1)^2 = 1

⇒\(\left[ \begin{array}{l}2x-1=1\\2x-1=-1\end{array} \right.\)

\(\left[ \begin{array}{l}2x=2\\2x=0\end{array} \right.\)

\(\left[ \begin{array}{l}x=1\\x=0\end{array} \right.\)

Vậy x∈{1;0}

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