Question

Tìm các cặp \(\left(x;y\right)\)thỏa mãn: \(\left(x-3\right)^{2012}+\left(3y-12\right)^{2014}\le0\)

Answer 1

Ta thấy:\(\left(x-3\right)^{2012}=\left(\left(x-3\right)^{1006}\right)^2\ge0\)

\(\left(3y-12\right)^{2014}=\left(\left(3y-12\right)^{1007}\right)^2\ge0\)

=>\(\left(x-3\right)^{2012}+\left(3y-12\right)^{2014}\ge0\)

mà \(\left(x-3\right)^{2012}+\left(3y-12\right)^{2014}\le0\)

=>\(\left(x-3\right)^{2012}+\left(3y-12\right)^{2014}=0\)

=>\(\left(x-3\right)^{2012}=0=>x-3=0=>x=3\)

\(\left(3y-12\right)^{2014}=0=>3y-12=0=>3y=12=>y=4\)

Vậy x=3,y=4