设n为正整数,在1与n+1之间插入n个正数,使这n+2个数成等比数列,求所插入的n个正数的乘积
设题中等比数列的公比为q,则 qn+1=n+1. 所插入的n个正数分别为 q,q2,…,qn , 则它们的乘积为 q1+2+…+n=qn/2(n+1) =(n+1)n/2
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