数列{an}是正项等比数列,{bn}是等差数列,且a6=b7,则有( )
已知数列{an}是正项等比数列,{bn}是等差数列,且a6=b7,则一定有( )
数列{an}是各项均为正的等比数列,{bn}是等差数列,且a6=b7,则有
若{an}是各项均为正数的等比数列,{bn}是等差数列,且a6=b7则有a3+a9__b4+b10
等比数列an中,有a3*a11=4a7,数列bn是等差数列,且b7=a7,则b5+b9=
等比数列{an}中,有a3·a11=4a7,数列{bn}是等差数列,且b7+a7,则b5+b9=?
公差不为零的等差数列{an}中,有2a3-a7²+2a11=0,数列{bn}是等比数列,且b7=a7,则b6b
已知等比数列 ﹛an﹜ 中,有a3a11=4a7,数列﹛bn﹜是等差数列,且b7=a7,则b5+b9等于?
等差数列{an}中,a3+a11=8,数列{bn}是等比数列,且b7=a7,则b6b8的值为 ( )
在公差不为0的等差数列an中,有2a3-a7²+2a11=0,数列bn是等比数列,且b7=a7
已知数列{an}是等比数列,数列{bn}是等差数列,且b1=a1,b3=a2,b7=a3,求数列{an}的公比
正项的等差数列{an}中,2a3-a72+2a11=0,数列{bn}是等比数列,且b7=a7,则b6b8=______.
每项都不为0的等差数列{an}中,2a3-a7^2+2a11=0,数列{bn}是等比数列,且b7=a7,则b6*b8等于