等差数列的公差为3,若a2,a4,a8成等比数列,求a4
等差数列的公差为3,若a2,a4,a8成等比数列,求a4
已知等差数列{an}的公差为3,若a2,a4,a8成等比数列,则a4等于( )
已知数列{an}是公差不为零的等差数列,且a2=3,又a4,a5,a8成等比数列
等差数列an的公差为d=2,若a1,a3,a4成等比数列,求a2.
已知等差数列{An}的公差为2,若A1 A3 A4 成等比数列,求A2?
已知等差数列{an}的公差为3,若a1,a3,a4成等比数列,则a2=
等差数列an ,的公差为3,若a1,a3,a4成等比数列,则a2=?
已知数列{an}是公差不为零的等差数列,a1=2,且a2,a4,a8成等比数列
已知数列an是公差不为零的等差数列,a1=2,且a2,a4,a8成等比数列,求数列an的通项公式
已知前n项和为Sn的等差数列{an}的公差不为零,且a2=3,又a4,a5,a8成等比数列
已知等差数列{an}的公差为2,若a1,a3,a4成等比数列,则a2=?
1、等差数列{an}的公差为2,若a1 a3 a4成等比数列,a2等于?