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数学
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41+43+45+.+77+79=
人气：448 ℃ 时间：2020-03-21 16:11:14
解答
首尾相加得41+79=120,42+78=120,以此类推,中间剩下一个60,呵呵 会算了吧
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41+43+45+``````+77+79等于多少,还有这种问题怎么算
用以上规律,41+43+45……+77+79
108°54′-79°32′= 77°42′+34°45′=
（1）1+3+5+7+.+(2n-1)+(2n+1)=?（2）41+43+45+47+.+77+79=?
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