设数列{an}是等比数列,a1=C2m+33m•Am-21,公比q是(x+14x
题型:解答题
问题:
设数列{an}是等比数列,a1=C2m+33m•Am-21,公比q是(x+
(1)用n,x表示通项an与前n项和Sn; (2)若An=Cn1S1+Cn2S2+…+CnnSn,用n,x表示An. |
设数列{an}是等比数列,a1=C2m+33m•Am-21,公比q是(x+
(1)用n,x表示通项an与前n项和Sn; (2)若An=Cn1S1+Cn2S2+…+CnnSn,用n,x表示An. |