1640年法国数学家费马提出了猜想:
是质数,我们称
为“费马数”.设
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9d89502f50b4d8d3f2f66786bc5e01.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47248a38e84a4e3b2f76c40b5cf1d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9da2b0e7b9eca965043be2f38a91f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee1af24b46162924648af2f8b4ca8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9d89502f50b4d8d3f2f66786bc5e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000a24d1cf81b08493232a3ddcb8fd39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.7 | B.8 | C.9 | D.10 |
更新时间:2024-01-06 09:57:43
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解题方法
【推荐1】已知定义在R上的偶函数
满足
,且当
时,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f42d716faccde128adf59440fd4dbc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbb01a7f5e9861aa185c6c63fcd58c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944792a0f775df22da3c84c7bd089735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e2b7e28067d812eecd139fee7ac0eb.png)
A.![]() | B.1 | C.2 | D.3 |
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【推荐2】为了保证杭州亚运会运动员能够吃上新鲜食材,亚运会后勤采购部门决定从千岛湖某水产站直接采购新鲜活鱼.活鱼出水后,须在最短时间内将其处理掉,否则会失去新鲜度.已知某种活鱼失去新鲜度
与其出水时间
(分)满足函数关系:
.若出水后20分钟失去新鲜度为10%,出水后40分钟失去新鲜度为30%.若不及时处理,在多长时间后失去全部新鲜度( )
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b8e92a8e5f2241d39fef104ff75b00.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4191454bebd60d62113ffd5560f121.png)
A.52 | B.59 | C.62 | D.69 |
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【推荐1】已知数列
满足
为其前n项和.若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17df96a7a2155cd88007e538f623f866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614306cc3f34bdee4d5d885b79667645.png)
A.20 | B.30 | C.31 | D.62 |
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【推荐2】数列
的首项
,前
项之和为
,已知向量
,且
时,
成立,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772e0b820940a92859adf1b80b84313e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb708a25d30954a0a50b01d59453bbe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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