2+4+6+8+10+...+98+100
= (2+100)+(4+98)+(6+96)+...(50+52)
= 102+102+102+ ...+102 (一共25个)
= 102×25
= 2550
--------------------
梳理知识,帮助别人,愉悦自己.
“数理无限”团队欢迎你
2+4+6+8+10+...+98+100
= (2+100)+(4+98)+(6+96)+...(50+52)
= 102+102+102+ ...+102 (一共25个)
= 102×25
= 2550
--------------------
梳理知识,帮助别人,愉悦自己.
“数理无限”团队欢迎你