1/(n+1)+1/(n+2)+…+1/2n>1/2
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1/(n+1)+1/(n+2)+…+1/2n>1/21/(n+1)+1/(n+2)+…+1/2n>1/21/(n+1)+1/(n+2)+…+1/2n>1/21/(n+1)+1/(n+2)+…+1/2n
1/(n+1)+1/(n+2)+…+1/2n>1/2
1/(n+1)+1/(n+2)+…+1/2n>1/2
1/(n+1)+1/(n+2)+…+1/2n>1/2
1/(n+1)+1/(n+2)+…+1/2n>1/(n+n)+1/(n+n)+…+1/2n=n*1/2n=1/2
一楼的也说得有道理!
这用证明吗?1/2加任何正数不都大于1/2吗
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