để mk sửa lại đề cho
\(f\left(x\right)=\)\(x^{2013}-2013x^{2012}+..+2013-1\)
\(=x^{2013}-\left(2012+1\right)x^{2012}+...+\left(2012+1\right)x-1\)
\(=x^{2013}-2012x^{2012}-x^{2012}+...+2012x+x-1\)
\(=x^{2012}\left(x-2012\right)-x^{2011}\left(x-2012\right)+...+x^2\left(x-2012\right)+2012-1\)
\(\Rightarrow f\left(2012\right)=x^{2012}\left(2012-2012\right)-x^{2011}\left(2012-2012\right)+...+x\left(2012-2012\right)+2012-1\)
\(=x^{2012}.0-x^{2011}.0+...+x.0+2012-1\)
=2011
Vậy f(2012)=2011
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