Giai phuong trinh: $\sqrt[]{2x-3}$ / $\sqrt[]{x-1}$ = 2 Question Giai phuong trinh: $\sqrt[]{2x-3}$ / $\sqrt[]{x-1}$ = 2 in progress 0 Môn Toán Mít Mít 4 years 2020-11-24T10:33:41+00:00 2020-11-24T10:33:41+00:00 1 Answers 1162 views -1
Answers ( )
Giải thích các bước giải:
`sqrt(2x-3)/sqrt(x-1)=2`
`ĐKXĐ:`$\left\{\begin{matrix}2x-3\ge0\\x-1>0\end{matrix}\right.$`=>`$\left\{\begin{matrix}x\ge\dfrac32\\x>1\end{matrix}\right.$`=>x>=3/2`
`=>sqrt(2x-3)=2sqrt(x-1)`
`=>sqrt(2x-3)=sqrt(4x-4)`
`=>2x-3=4x-4`
`=>4x-2x=4-3`
`=>2x=1`
`=>x=1/2` `(`không thỏa mãn`)`
Vậy `x inO/`