生态学研究发现:当种群数量较少时,种群近似呈指数增长,而当种群增加到一定数量后,增长率就会随种群数量的增加而逐渐减小,为了刻画这种现象,生态学上提出了著名的逻辑斯谛模型:
,其中
,
,
是正数,
表示初始时刻种群数量,
叫做种群的内秉增长率,
是环境容纳量.
可以近似刻画
时刻的种群数量.下面给出四条关于函数
的判断正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aba7839e1f30ac652b11c8b9534bea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ccd4537f4dee2050ade38b972eb9b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af670ebba51f5af6b6055af1f62f5f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af670ebba51f5af6b6055af1f62f5f4d.png)
A.如果![]() ![]() ![]() |
B.如果![]() ![]() ![]() |
C.如果![]() ![]() ![]() ![]() ![]() |
D.如果![]() ![]() ![]() ![]() |
更新时间:2023-11-05 23:49:53
|
【知识点】 由导数求函数的最值(含参)
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