等差数列{an}、{bn}的前n项和分别为Sn、Tn,且
,则使得
为整数的正整数n的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d09f2e2d3866d0020d9637bf196baeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462f644c4a74b81d24687e3fc613ec54.png)
A.3 | B.4 | C.5 | D.6 |
更新时间:2017-07-23 15:19:30
|
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知数列
的各项均为正数,且
,则数列
的前n项和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd92c88ef32c4345dcddf7cd4aa4d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf3da897eb73b729f66bb0d700775c5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】各项为实数的等差数列的公差为4, 其首项的平方与其余各项之和不超过100, 这样的数列至多有项.
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】设等差数列
的前
项和分别为
,若
,则使
的
的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478421b81927e435cbcf5acafa89efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29a152cbe99ee4513bed448f400a20d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e43fba287c84b23eac5ba1ec006de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】若两个等差数列
、
的前
项和分别为
、
,且满足
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9712e7245d619e6a2f29534ed22f0b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec00f8859a491cdd60a68ce94dcb7a7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次