|a-b|=-1/5,
绝对值怎么能等于负数呢?应该是1/5吧?
a+b=0,|a-b|=1/5,2|a|=1/5,|a|=1/10,ab=-1/100,(a-ab+b)/(a*a+ab+1)=(1/100)/[a(a+b)+1]=(1/100)/1=1/100
|a-b|=-1/5,
绝对值怎么能等于负数呢?应该是1/5吧?
a+b=0,|a-b|=1/5,2|a|=1/5,|a|=1/10,ab=-1/100,(a-ab+b)/(a*a+ab+1)=(1/100)/[a(a+b)+1]=(1/100)/1=1/100