由题意得,a1=1/4,a5=4
设等比数列的的公比为q
则a2=a1*q,a3=a1*q^2,a4=a1*q^3,a5=a1*q^4
由此解得q=2或-2
当q=2时,a2=1/2,a3=1,a4=2
当q=-2时,a2=-1/2,a3=1,a4=-2
由题意得,a1=1/4,a5=4
设等比数列的的公比为q
则a2=a1*q,a3=a1*q^2,a4=a1*q^3,a5=a1*q^4
由此解得q=2或-2
当q=2时,a2=1/2,a3=1,a4=2
当q=-2时,a2=-1/2,a3=1,a4=-2