名校
解题方法
1 . 记数列
的前n项和为
,其中所有奇数项之和为
,所有偶数项之和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd3e46b2b2a97f5296aece98ba9279e.png)
若
是等差数列,项数n为偶数,首项
,公差
,且
,求
;
若数列
的首项
,满足
,其中实常数
,且
,请写出满足上述条件常数t的两个不同的值和它们所对应的数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4866d1c01cd46de5d1d9448e4104e15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd3e46b2b2a97f5296aece98ba9279e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c901eee27dbbcbe46e52c9f72c201d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f179aeceb1c525c8f7f27d61c9351c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400c3af7900b809e38a67c906ed23d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f45c342373d9253df5c132a2e9b87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371a7f8799f3bc81797bdedf4a282dad.png)
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