计算:(2²+4²+……+100²)-(1²+3²+……+99²)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/24 00:29:21
x){nuӭ4Ԕ
-Me@mh` 0J*I*ҧv6p%ՠ5U.b1@MӀۨiP 46ChF 1b6`%P!$z
计算:(2²+4²+……+100²)-(1²+3²+……+99²)
计算:(2²+4²+……+100²)-(1²+3²+……+99²)
计算:(2²+4²+……+100²)-(1²+3²+……+99²)
(2²+4²+……+100²)-(1²+3²+……+99²)
=(2²-1²)+(4²-3²)+(6²-5²)+……+(100²-99²)
=(1+2)+(3+4)+(5+6)+……+(99+100)
=5050
(2²+4²+……+100²)-(1²+3²+……+99²)
=(2²-1²)+(4²-3²)+(6²-5²)+……+(100²-99²)
=(1+2)+(3+4)+(5+6)+……+(99+100)
=(1+100)*100/2
=5050