已知数列{an}是公比q≠1的等比数列,则在“(1){anan+1};(2){a
题型:选择题
问题:
已知数列{an}是公比q≠1的等比数列,则在“(1){anan+1};(2){an-an+1}; (3){an3};(4){nan}”这四个数列中,成等比数列的个数是( )
A.1
B.2
C.3
D.4
已知数列{an}是公比q≠1的等比数列,则在“(1){anan+1};(2){an-an+1}; (3){an3};(4){nan}”这四个数列中,成等比数列的个数是( )
A.1
B.2
C.3
D.4