今年上半年新冠肺炎全球大爆发.在某个时间点,某城市每周新增发病人数
(单位:千人)与时间t(单位:周)之间近似满足
,该城市从有人发病到发现人传人时,已有发病人数
(千人),且当
时,
(千人).从第3周后,该城市采取封城的隔离措施,再经过两周之后,隔离措施产生效果,新增发病人数
.
(Ⅰ)求该城市第5,6,7周新增发病人数;
(Ⅱ)随着该城市不断加大科研投入,治愈人数
(单位:千人)与时间t(单位:周)存在关系
,为保障每一位新增病人能及时入院治疗,该城市前九周(不考虑死亡人数的前提下)至少需要准备多少病人床位?(保留二位小数)(注:出院人数不少于新增发病人数时,总床位不再增加)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8705064bb1ac4934b21bb5a01eff6c7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4f2e734f012cde5a4c089d00e9ddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ec6427e5abd9ad70fc3aa8533fd5a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106cd91d11760833dd96a706f5041b7a.png)
(Ⅰ)求该城市第5,6,7周新增发病人数;
(Ⅱ)随着该城市不断加大科研投入,治愈人数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e8b191a7f982cc6a4230ae57bf6ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eceb8556afae0397cb7b94e5b297f636.png)
19-20高一下·湖北·期中 查看更多[3]
湖北省鄂东南联盟2019-2020学年高一下学期期中联考数学试题(已下线)痛点9 数列的综合问题-2021年新高考数学一轮复习考点扫描(已下线)4.1.1 实数指数幂及其运算-2020-2021学年高一数学课时同步练(新人教B版必修第二册)
更新时间:2020-08-16 10:52:54
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解答题-证明题
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适中
(0.65)
【推荐1】已知函数
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(1)证明:
;
(2)若
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(1)证明:
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(2)若
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解答题-应用题
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适中
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名校
解题方法
【推荐1】温州某农家乐度假区,为了吸引顾客,将对农家乐内一块凸五边形区域进行开发利用,如图所示(单位:百米).具体要求为:以CD为边,在剩余的边上取一点P,
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![](https://img.xkw.com/dksih/QBM/2021/11/13/2850628170964992/2856271598731264/STEM/f9981c27-f392-4339-83ee-0a292989f244.png?resizew=203)
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)根据以往农家乐旅游收入和成本运营情况,
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解答题-问答题
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适中
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名校
【推荐2】如图,在正方形
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(1)当质点
运动
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(2)在质点
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(单位:
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/9662bdb1-d20c-42a4-b515-6ac65a01bb75.png?resizew=141)
(1)当质点
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(2)在质点
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(1)请写出今年起第
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(2)求从今年起
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知数列
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(1)求数列
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