l1/1010-1/1009l+l1/1009-1/1008l-l1/1010-1/1008l怎么计算
问题描述:
l1/1010-1/1009l+l1/1009-1/1008l-l1/1010-1/1008l怎么计算
答
原式=1/1009-1/1010+1/1008-1/1009-1/1008+1/1010
=0