设等差数列an的公差和等比数列bn的公比=d,a1=b1,a2=b2,a4=b4
设等差数列an的公差和等比数列bn的公比=d,a1=b1,a2=b2,a4=b4
等差数列{an}等比数列{bn}其中a1=b1 a2=b2 a4=b4 两数列公差公比都为d 求{an}{bn}
设等差数列{an}的公差与等比数列{bn}的公比都是d,d≠1,a1=b1,a4=b4,a10=b10
等差数列{an}的公差和等比数列{bn}的公比都是d,d不等于1,且a1=b1,a4=b4,a10=b10,求1)a1和
已知等差数列{an}的公差d不等于0,数列{bn}是等比数列,a1=b1=1,a2=b2,a4=b4
已知等差数列{an}的公差d不等于0,数列{bn}是等比数列,a1=b1=1,a2=b2,a4=b4
1``已知等差数列{An}的公差和等比数列{Bn}的公比都是d(d不为0)且a1=b1,a4=b4,a10=b10.
等差数列{an}的公差和等比数列{bn}的公比都是d,d不等于1,且a1=b1,a4=b4,a10=b10
已知,等差数列{an}的公差和等比数列{bn}的公比都是d(d≠1),a1=b1,a4=b4,a10=b10.
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
已知等差数列{an}的公差和等比数列{bn}的公比是同一个非零实数d,且a1=b1,a4=b4,
an为等差数列,bn为等比数列,a1=b1=1,a2+a4=b3,b2*b4=a3,求an的前10项和及bn