两个等差数列{a
n}和{b
n}的前n项和分别为S
n和T
n，若
＝，则
=______．
人气：301 ℃ 时间：2019-10-19 14:39:50
解答
推荐
- 两个等差数列{an}和{bn}的前n项和分别为Sn和Tn，若SnTn＝7n+3/n+3，则a8b8=_．
- 等差数列{an},{bn},的前n项和分别为Sn,Tn且Sn/Tn=(3n-1)/(2n+3)则a8/b8=
- 设等差数列﹛an﹜﹛bn﹜的前n项和分别为Sn,Tn.且Sn/Tn=n-9/5n-9.则a8/b8=?
- {an},{bn}是两个等差数列,其前n项和分别为Sn和Tn,且Sn/Tn=(7n+2)/(n+3),则a8/b8=
- 等差数列{an},{bn}的前n项和分虽为Sn和Tn,若Sn/Tn=2n/3n+1,则a8/b8= ,an/bn=
- it is along ideological lines that the debate over multiculturalism has assumed its current form..
- 现有浓度为20%糖水300克,要变为浓度是40%的糖水需加糖多少克?
- 自然界新物种的形成是长期什么的结果新品种呢
猜你喜欢
