Tìm x biết :x(x-2015)+x-2015=0
Tìm x biết (x-2015)x+1-(x-2015)x+2015=0
(x-2015)^x+1 - (x-2015)^x+2015
=>x-2015= 0;1;-1
x-2015=0 =>x=2015
x-2015=1 =>x=2016
x-2015=-1 =>x=2014
Tìm x biết 5 x ( x − 2015 ) − x + 2015 = 0
tìm x biết : 8x (x-2015)-x+2015=0
Ta có: \(8x\left(x-2015\right)-x+2015=0\)
\(\Rightarrow8x\left(x-2015\right)-\left(x-2015\right)=0\)
\(\Rightarrow\left(8x-1\right)\left(x-2015\right)=0\)
\(\Rightarrow\orbr{\begin{cases}8x-1=0\\x-2015=0\end{cases}\Rightarrow\orbr{\begin{cases}x=\frac{1}{8}\\x=2015\end{cases}}}\)
Vậy \(x=\left\{\frac{1}{8};2015\right\}\)
8x(x - 2015) - (x - 2015) = 0
<=> (8x - 1)(x - 2015) = 0
<=> ........... đến đây thì dễ rồi :))))
8x(x-2015)-x+2015=0
8x(x-2015)-(x-2015)=0
(8x-1)(x-2015)=0
\(\orbr{\begin{cases}8x-1=0\\x-2015=0\end{cases}}\)=>\(\orbr{\begin{cases}8x=-1\\x=2015\end{cases}}\)=>\(\orbr{\begin{cases}x=\frac{1}{8}\\x=2015\end{cases}}\)
vậy x \(\in\){\(\frac{1}{8}\);2015}
Tìm x biết : | x - 2015 | = 20100 + 12015
Tìm x biết |x+2013| + |x+2014| + |x+2015| = x 0
Ta có / x + 2013 / + / x + 2014 / + / x + 2015 / = 0x
\(=>x+2013+x+2014+x+2015=0\)
\(=>\hept{\begin{cases}x+2013=0\\x+2014=0\\x+2015=0\end{cases}=>\hept{\begin{cases}x=-2013\\x=-2014\\x=-21015\end{cases}}}\)
Tìm x biết : x + (x + 1) + (x + 2) +.........+ (x + 2015) + (x + 2016) = 0
Tìm x, biết:
(x+2015).(x-2016)=0
=> x+2015=0 hoặc x-2016=0
=>x=0-2015 hoặc x=0+2016
=>x=-2015 hoặc x=2016
Vậy x=-2015 hoặc x=2016
Tìm X biết :
X-4 x X-2015<0
tìm x : x.( x - 2015 ) - x + 2015 = 0
\(x.\left(x-2015\right)-\left(x-2015\right)=0\)
\(\left(x-1\right)\left(x-2015\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-1=0\\x-2015=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=1\\x=2015\end{cases}}\)
\(x\cdot\left(x-2015\right)-x+2015=0\)
\(x\cdot\left(x-2015\right)-\left(x-2015\right)=0\)
\(\left(x-2015\right)\cdot\left(x-1\right)=0\)
\(\orbr{\begin{cases}x-2015=0\\x-1=0\end{cases}\Rightarrow\orbr{\begin{cases}x=2015\\x=1\end{cases}}}\)
Ta có : x( x - 2015 ) - x + 2015 = 0
\(\Rightarrow\)x( x - 2015 ) - ( x - 2015 ) = 0
\(\Rightarrow\)( x - 2015 )( x - 1 ) = 0
\(\Leftrightarrow\)x - 2015 = 0 hoặc x - 1 = 0
\(\Rightarrow\)x = 2015 hoặc x = 1
Vậy : x = 2015 hoặc x = 1