Lim 【1/1*2+1/2*3+…+1/n(n+1)】 N→∞ 求极限
2个回答
原式=lim(1-1/2+1/2-1/3+……+1/n-1/(n+1)]
=lim[1-1/(n+1)]
=1-0
=1
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