问题描述:
已知.1/n(n+1)=A/n+B/n+1,试求A,B的值,并利用他计算(1)1/1*2+1/2*3+1/3*4+...+1/99*100
1/n(n+1)+1/(n+1)*(n+2)+1/(n+2)*(n+3)+...+1/(n+99)*(n+100)
1/n(n+1)+1/(n+1)*(n+2)+1/(n+2)*(n+3)+...+1/(n+99)*(n+100)
问题解答:
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