=>\(\left(1-2x\right)^2\ge0\)
=>\(\left(1-2x\right)^2+2007\ge2007\)
=>\(\frac{1}{\left(1-2x\right)^2+2007}\le\frac{1}{2007}\)
GTLN N = \(\frac{1}{2007}\)
dấu "=" xảy ra khi 1-2x=0 => x=\(\frac{1}{2}\)
vậy x=\(\frac{1}{2}\)thì GTLN N = \(\frac{1}{2007}\)