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高二数学 (人教版)

第一章导数及应用

导数与函数

原函数图像与导函数图像的关系00:14:55

构造函数、巧用导数解不等式00:12:38

利用导数求参数的取值范围00:09:14

用导数求单调区间00:14:13

导数与数学思想00:11:57

用导数证明不等式00:08:50

用导数处理函数的最值00:18:54

用最值研究恒成立问题00:14:42

利用导数求函数的极值、最值00:16:16

10.

导数与极值00:14:29

11.

用导数求函数在闭区间上的最值（必考）00:14:01

12.

导数、零点、方程的根三者之间的关系00:13:26

13.

利用导数判断三次方程根的个数00:10:06

14.

利用导数判断三角函数零点个数00:09:36

本课配套习题挑战模式1/3

返回课程

单选题

难度系数：

1.设

. 若

对一切

恒成立,则

的取值范围是（）

A:

B:

C:

D: [

提示1：IOWPquimgeiuqeWHveaVsOWcqFs8aW1nIHdpZHRoPTc1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0QxLzk4L3JCQUNFMU5IeWRqRFFNdFRBQUFCaXlYVTJoYzc0MS5wbmciPuS4iueahOacgOWwj+WAvOWkp+S6juetieS6jjDlsLHlj6/ku6XkuobjgII=
提示2：IOWPr+S7peaxguWvvOaVsO+8jOaxguWHuuWHveaVsOWcqFs8aW1nIHdpZHRoPTc1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0QxLzk4L3JCQUNFMU5IeWRqRFFNdFRBQUFCaXlYVTJoYzc0MS5wbmciPuS4iueahOacgOWwj+WAvOOAgg==
答案：QQ==
6KejOjxpbWcgd2lkdGg9NzkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZGp4YmstaEFBQUNsVzQzVjUwNTc1LnBuZyI+PGltZyB3aWR0aD0yMTIgaGVpZ2h0PTQ0IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZGl5bEIydkFBQUZBaHJRUDUwNTk3LnBuZyI+PGJyPuS7pDxpbWcgd2lkdGg9NzkgaGVpZ2h0PTQ0IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRDEvOTgvckJBQ0UxTkh5ZGlRYU5FMUFBQURTelJ4Zl9FMTgwLnBuZyI+77yM5YiZPGltZyB3aWR0aD0xMDAgaGVpZ2h0PTQ3IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZGlqOW9ncUFBQUVVUk0wcmM4MjUyLnBuZyI+PGJyPueUsTxpbWcgd2lkdGg9MTI0IGhlaWdodD00NyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRpeVVDTDJBQUFFeVVTQjVoYzQ4OS5wbmciPuW+lzxpbWcgd2lkdGg9MzcgaGVpZ2h0PTE5IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRDEvOTgvckJBQ0UxTkh5ZGpSSG5NR0FBQUJ2bWg4OVEwMDUwLnBuZyI+LuaJgOS7pTxpbWcgd2lkdGg9MzMgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZGppSWZWZ0FBQUNIUzdQcVlVODM2LnBuZyI+5ZyoPGltZyB3aWR0aD00OSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9CMi9BRS9yQkFDRkZOSHlkaUExdGJOQUFBQ1d4M1pPMDA4ODUucG5nIj7kuIrljZXosIPpgJLlop4sIDxpbWcgd2lkdGg9MzMgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZGppSWZWZ0FBQUNIUzdQcVlVODM2LnBuZyI+5ZyoPGltZyB3aWR0aD00NSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9EMS85OC9yQkFDRTFOSHlkaVRMZlhBQUFBQ0FIblJCRUE4MzMucG5nIj7ljZXosIPpgJLlh48uPGJyPuaJgOS7pTxpbWcgd2lkdGg9MTUzIGhlaWdodD0yNCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRqeTk2ODFBQUFELVZKQjdubzE1OS5wbmciPjxicj7nlLHmraTlvpfvvJo8aW1nIHdpZHRoPTM1IGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRqUVY2eHpBQUFCbnpDeTFZMDg4Ni5wbmciPjxicj7lj4g8aW1nIHdpZHRoPTQ1IGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRtU1NrbmhBQUFCZnkxaHF6azgzOS5wbmciPuaXtu+8jDxpbWcgd2lkdGg9ODAgaGVpZ2h0PTI0IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjIvQUUvckJBQ0ZGTkh5ZG5RZ2ZlSUFBQUM0bDZuaEpNMDUzLnBuZyI+5Y2z5Li6PGltZyB3aWR0aD02NyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9EMS85OS9yQkFDRTFOSHlkbVRnLW54QUFBQ1UzZU5SQUkwNzUucG5nIj7mraTml7Y8aW1nIHdpZHRoPTEzIGhlaWdodD0xNSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRpenRKcnBBQUFCUzB3UG5JazMwMy5wbmciPuWPluS7u+aEj+WAvOmDveaIkOerizxicj7nu7zkuIrlvpfvvJo8aW1nIHdpZHRoPTM1IGhlaWdodD0xOSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0IyL0FFL3JCQUNGRk5IeWRqUVY2eHpBQUFCbnpDeTFZMDg4Ni5wbmciPjxicj48YnI+PGJyPg==