1\1x2x3+1\2x3x4+1\3x4x5+``````+1\48x49x50注:(\)为分数线(x)为乘号
问题描述:
1\1x2x3+1\2x3x4+1\3x4x5+``````+1\48x49x50注:(\)为分数线(x)为乘号
答
1/1x2x3=1/2(1/1x2-1/2x3)依次类推结果为306/1225
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