给点时间,好吗?设，等比数列公比为q，据题意2×1/2a3=a2q=3a2/q+2a2，得出q=3/q+2，解得q=3（符合题意)
（a10+a12+a15+a19+a20+a23）/（a8+a10+a13+a17+a18+a21）
=a10(1+q^2+q^5+q^9+q^10+q^13)/a8(1+q^2+q^5+q^9+q^10+q^13)
=a10/a8
=q^2
=9
good luck to you,best wishes to your study谢啦！那个q我纠结好久=v=