设等差数列的首项为a1,公差为d,且d≠0等比数列的公比为t,由题意t≠1(否则d=0)则等差数列的第k项为a1+(k-1)d等差数列的第n项为a1+(n-1)d等差数列的第p项为a1+(p-1)d令a1+(k-1)d＝X －－－－－－－①则a1+(n-1)d＝X*t ...