không có kết quả x nào tương ứng nha bạn

Ta có: \(x^{2014}+x^{2012}+x^{2010}+...+x^2+1=0\)

=>\(x^{2014}+x^{2012}+x^{2010}+...+x^2=0-1=\left(-1\right)\)

Vô lí => X không có giá trị .

Có\(\left|x-2010\right|+\left|x-2012\right|+\left|x-2014\right|\ge\left|x-2010+2014-x\right|+\left|x-2012\right|\ge2\)

mà\(\left|x-2010\right|+\left|x-2012\right|+\left|x-2014\right|=2\)

dấu "=' \(\Leftrightarrow\left\{{}\begin{matrix}x-2012=0\\2010\le x\le2014\end{matrix}\right.\)\(\Rightarrow x=2012\)

\(\frac{2}{5}\cdot\frac{1}{2}-\frac{2}{5}\cdot\frac{1}{3}-\frac{2}{5}\cdot\frac{1}{6}\)

\(=\frac{2}{5}\cdot\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)

\(=\frac{2}{5}\cdot\frac{0}{6}=\frac{2}{5}\cdot0=0\)

tìm x

a)  \(0,5+\left(x-\frac{15}{2}\right):\frac{1}{2}=\frac{9}{2}\)

\(\Rightarrow x=\frac{19}{2}=8,5\)

b) \(2012\cdot x-2010\cdot x=2014\)

  \(\Leftrightarrow\left(2012-1010\right)\cdot x=2014\)

\(\Leftrightarrow2x=2014\)

\(\Rightarrow x=\frac{2014}{2}=1007\)

hok tốt .

Tính nhanh:

2/5 x 1/2 - 2/5 x 1/3 - 2/5 x 1/6

= 2/5 x ( 1/2 - 1/3 - 1/6 )

= 2/5 x ( 3/6 - 2/6 - 1/6 )

= 2/5 x 0/6

=0

Tính nhanh :

\(\frac{2}{5}\cdot\frac{1}{2}-\frac{2}{5}\cdot\frac{1}{3}-\frac{2}{5}\cdot\frac{1}{6}\)

= \(\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\cdot\frac{2}{5}\)

= \(\left(\frac{3}{6}-\frac{2}{6}-\frac{1}{6}\right)\cdot\frac{2}{5}\)

= \(0\cdot\frac{2}{5}\)

= \(0\)

Tìm x biết :

a) a, 0,5 + ( x - \(\frac{15}{2}\) ) : \(\frac{1}{2}\)= \(\frac{9}{2}\)

         ( x - \(\frac{15}{2}\)) : \(\frac{1}{2}\)= \(\frac{9}{2}\)-   0,5

          ( x - \(\frac{15}{2}\)) : \(\frac{1}{2}\)= 4

          ( x - \(\frac{15}{2}\)) = 4 x \(\frac{1}{2}\)

          x - \(\frac{15}{2}\)= 2

          x = 2 + \(\frac{15}{2}\)

          x = \(\frac{19}{2}\)

b, 2012 x X - 2010 x X = 2014

    ( 2012 - 2010 ) x X = 2014

              2 x X = 2014

                    X = 2014 : 2 

                    X = 1007