问题标题:
【8+11+14+17+20+·······+305数学计算题.呜呜呜1+2+3+4+···················+98+99+100+99+98+···············+3+2+1】
问题描述:
8+11+14+17+20+·······+305数学计算题.呜呜呜
1+2+3+4+···················+98+99+100+99+98+···············+3+2+1
姜洪臣回答:
8+11+14+17+20+·······+305=(8+305)*100/2=313*501+2+3+4+···················+98+99+100+99+98+···············+3+2+1=1+2+3+4+···················+...
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