数学趣味知识园开幕H1.1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/1 2.1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1

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数学趣味知识园开幕H1.1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/12.1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1数学趣味知识园开幕H

数学趣味知识园开幕H1.1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/1 2.1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1
数学趣味知识园开幕H
1.1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/1 2.1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1

数学趣味知识园开幕H1.1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/1 2.1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1
1X4/1+4X7/1+7X10/1+10X13/1+.+97X100/1=0.33
1X2X3/1+2X3X4/1+3X4X5/1+4X5X6/1+5X6X7/1=21/5