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a+b+c=0 => a^2+b^2+c^2+2ab+2bc+2ca = 0 => a^2+b^2+c^2=0
=> a^2+b^2+c^2 = ab+bc+ca
=> 2a^2+2b^2+2c^2 = 2ab+2bc+2ca
=> (a-b)^2 + (b-c)^2 + (c-a)^2 = 0
=> a=b=c, mà a+b+c=0 => a=b=c=0
thay vào
M=(0-2016)2016+(0-2016)2016-(0-2016)2016=(-2016)2016=20162016
Chúc bạn hoc tốt ùng hộ nha
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Ta có
(m+n+p)^q >= m^q+n^q+p^q
=>a+b+c=1
=>(a+b+c)^2016=1 >= a2016 + b2016 + c2016
Mà a2016 + b2016 + c2016 >=0
=> a2016 + b2016 + c2016=1
\(A=-2\)
\(\Leftrightarrow5x^2+y^2+4xy-6x-2y=-2\)
\(\Leftrightarrow4x^2+x^2+y^2+4xy-4x-2x-2y+1+1=0\)
\(\Leftrightarrow\left(4x^2+4xy+y^2\right)-2\left(2x+y\right)+1+\left(x^2-2x+1\right)=0\)
\(\Leftrightarrow\left(2x+y\right)^2-2\left(2x+y\right)+1+\left(x-1\right)^2=0\)
\(\Leftrightarrow\left(2x+y-1\right)^2+\left(x-1\right)^2=0\)(1)
Mà \(\left(2x+y-1\right)^2+\left(x-1\right)^2\ge0\)nên (1) xảy ra
\(\Leftrightarrow\hept{\begin{cases}2x+y-1=0\\x-1=0\end{cases}}\Leftrightarrow\hept{\begin{cases}y=-1\\x=1\end{cases}}\)
\(\Rightarrow B=1^{2015}.\left(-1\right)^{2016}-1^{2016}.\left(-1\right)^{2017}+2014\)
\(=1+1+2014=2016\)