问题
选择题
等比数列{an}中,a5a14=5,则a8a9a10a11=( )
A.10
B.25
C.50
D.75
答案
∵等比数列{an}中,a5a14=5,
∴a8a9a10a11=(a5a14)2=25.
故选B.
等比数列{an}中,a5a14=5,则a8a9a10a11=( )
A.10
B.25
C.50
D.75
∵等比数列{an}中,a5a14=5,
∴a8a9a10a11=(a5a14)2=25.
故选B.