解:
a=(2018×2017-2018)/(2017×2017+2017)
=2018×(2017-1)/[2017×(2017+1)]
=2018×2016/(2017×2018)
=2016/2017
b=(2017×2016-2017)/(2016×2016+2016)
=2017×(2016-1)/[2016×(2016+1)]
=2017×2015/(2016×2017)
=2015/2016
a/b=(2016/2017)/(2015/2016)
=2016²/(2017×2015)
=2016²/[(2016+1)(2016-1)]
=2016²/(2016²-1)
>1
a>b