(1) 1+(-2)+3+(-4)+````````+99+(-100); (2)1+(-2)+3+(-4)+5+(-6)+``````````+(2n-1)=(-2n)(1) 1+(-2)+3+(-4)+````````+99+(-100)=(2)1+(-2)+3+(-4)+5+(-6)+``````````+(2n-1)=(-2n)=这两题目等于多少?
问题描述:
(1) 1+(-2)+3+(-4)+````````+99+(-100); (2)1+(-2)+3+(-4)+5+(-6)+``````````+(2n-1)=(-2n)
(1) 1+(-2)+3+(-4)+````````+99+(-100)=
(2)1+(-2)+3+(-4)+5+(-6)+``````````+(2n-1)=(-2n)=
这两题目等于多少?
答