当-1<X<2时,化简丨x-2丨-丨x+1丨

问题描述:

当-1<X<2时,化简丨x-2丨-丨x+1丨

-1x-2x+1>0
丨x-2丨-丨x+1丨
=2-x-(x+1)
=2-x-x-1
=1-2x