设数列{an}是等差数列,公差d≠0,若ak,am,ap三个数成等比数列,则其公比为
设等差数列{an}的各项均为整数,其公差d≠0,a5=6,若a3,a5,am(m>5)是公比为q(q>0)的等比数列,则
设等差数列{an}的公差d≠0,数列{bn}为等比数列,若a1=b1,b2=a3 b3=a2,则bn的公比为
若{an}是等差数列,公差d≠0,a2,a3,a6成等比数列,则公比为 ______.
已知数列an为等差数列,公差d≠0,bn为等比数列,公比为q,
等差数列(an)公差d≠0,如果,a5,a9,a15成等比数列,则公比为?
设有四个数,前三个成等差数列,其和为6,后三个数为等比数列,其积为27,求等差数列的公差d等比数列公比q
等差数列{an}的公差d≠0,且a5,a9,a15成等比数列,则公比为______.
已知数列{an}是公差不为0的等差数列,若a5,a10,a20三项成等比数列,则此等比数列的公比为______.
已知数列an为等差数列,公差d≠0,bn为等比数列,若b1=a1,b2=a3,b3=a2,公比是多少
已知数列an为等差数列,公差d≠0,bn为等比数列,若b1=a1,b2=a3,b3=a2,公比q=?
数学数列难题已知等差数列{an}公差为d,d不等于0,等比数列{bn}公比q,q大于1.设Sn =a1b1 +a2b2
等差数列{an}中,若公差d≠0,且a2、a3、a6成等比数列,则公比q等于( )