2.設a=-
【高佳君】評論
101=10 ,102=10010-1=1/10-10-1=-1/10解答a=-10-1=-1/10b=-10-2=-1/100c=-10-3 =-1/1000d=-10-4=-1/100001/10>1/100,-1/10<-1/100 以此類推因此 a < b < c < d