16级的说的很详细了。。。
x>派腔√2x+1(√2-1)x<-1x<-1/(√2-1)x<-√2-1x<-√2-1x+√2<-1<0x+√2+1<√2+1-√2-1<0│x+√2│-√〔x+√拆羡袭2+1〕旅兄²=-x-√2-[-(x+√2+1)]=-x-√2+x+√2+1=1
写清楚点,