a为实数,化简丨a+1丨-丨a-2丨当-1≤a<2时,化简当a<-1时,化简当a≥2时,化简
问题描述:
a为实数,化简丨a+1丨-丨a-2丨
当-1≤a<2时,化简
当a<-1时,化简
当a≥2时,化简
答
a为实数,化简丨a+1丨-丨a-2丨
当-1≤a<2时,化简
当a<-1时,化简
当a≥2时,化简