/17x-5/-/17x+5/=0
|17x -5 | - |17x+5 | =0
=>|17x-5|=|17x+5|
=>17x-5=17x+5(vô lý) hoặc 17x-5=-17x-5
=>34x=0
hay x=0
\(\left|17x-5\right|=\left|17x+5\right|\)
\(\Leftrightarrow\left[{}\begin{matrix}17x-5=17x+5\\17x-5=-5-17x\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}-5=5\left(loai\right)\\34x=0\end{matrix}\right.\Leftrightarrow x=0\)
\(\Leftrightarrow\left|17x-5\right|=\left|17x+5\right|\)
Xét \(17x-5\ge0\)
\(\Rightarrow17x-5=17x+5\left(voli\right)\)
Xét \(17x-5< 0\)
\(\Rightarrow17x-5=-17x-5\)
\(\Leftrightarrow34x=0\Leftrightarrow x=0\)
Vậy \(S=\left\{0\right\}\)
| 17x-5 | - | 17x+5 | = 0
(17x - 5)+ (17x + 5)=0
(17x - 5)=(17x + 5)=0
=> 17x-5=17x+5
<=> 17x-17x=5+5
<=>0x=10 (vô lí)
Vậy \(x\in\phi\)
Tìm x biết | 17x-5 | - | 17x+5| = 0
| 17x-5 | - | 17x+5| = 0
=> | 17x-5 | = 0 + | 17x+5|
=> | 17x-5 | = 17x+5
=> ...
/17x-5/-/17x+5/=0
giúp mình nhé!
Ta có : |17x - 5| - |17x + 5| = 0
=> |17x - 5| = |17x + 5|
Có 2 TH xảy ra :
TH1 : 17x - 5 = 17x + 5
=> 17x - 17x = 5 + 5
=> 0 = 10 (vô lý)
TH2 : 17x - 5 = - (17x + 5)
=> 17x - 5 = - 17x - 5
=> 17x + 17x = -5 + 5
=> 34x = 0
=> x = 0
Tìm x:
| 17x - 5 | - | 17x + 5 | = 0
|17x-5|-|17x+5|=0
|3x+4|=2|2x-9|
||x+5|-4|=3
tính x biết:\(\left|17x-5\right|-\left|17x+5\right|=0\)
<=> |17x - 5| = |17x + 5|
=> 17x - 5 = 17x + 5 hoặc 17x - 5 = -17x - 5
=> 0x = 10(loại) hoặc 34x = 0
<=> x = 0.
pt <=> | 17x - 5 | = | 17x + 5 |
\(\Leftrightarrow\orbr{\begin{cases}17x-5=17x+5\left(loai\right)\\17x-5=-17x-5\end{cases}}\)
\(\Leftrightarrow17x=-17x\)
\(\Leftrightarrow x=-x\)
\(\Leftrightarrow x=0\)
Tìm các số nguyên x thỏa mãn
a) |17x-5|-|17x+5|=0
b) |x+2|+|x-5|=7