一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c7501096f4be07c98e97e29db21a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407e4330cfdd5cd0bcfd4f3bd1a898e6.png)
A.4 | B.5 | C.9 | D.13 |
【知识点】 利用函数单调性求最值或值域解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d28e33684404289e84f9f88e422ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219f4bb809918d5c247af888f84287d4.png)
A.![]() | B.2 | C.1 | D.3 |
【知识点】 基本不等式“1”的妙用求最值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e08d8d701fe72cded7b5dbbc5442ded.png)
A.实数![]() ![]() | B.实数![]() ![]() |
C.实数![]() ![]() | D.实数![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57f879f6e8df7d5fb261328806260b3.png)
A.(-∞,-1]∪[9,+∞) | B.(-∞,-9]∪[1,+∞) |
C.[-1,9] | D.[-9,1] |
【知识点】 条件等式求最值解读 基本不等式“1”的妙用求最值
二、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112bfe02980165f995e41bae185048cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84321d37ec168d51bdc810a007845c38.png)
【知识点】 指数式与对数式的互化 对数的运算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669194affef8054e9e77f08e93fef285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a916811b6ae474bce19ce732cf401e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
【知识点】 基本不等式求和的最小值解读 基本不等式“1”的妙用求最值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b780895ce8fc7d9afaf8dd8cec56c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3aad22e8063ee065e00703063ade9e.png)
甲、乙两位同学分别给出了两种不同的解法:
甲:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8c4b8b99d40ba0eced2f9c8f64ce24.png)
乙:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fb5b7a7241886fdbb2438cef9b5e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
【知识点】 基本不等式求和的最小值解读
三、解答题
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c03256f5374101853665aa4c1934e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2d8a35221150de9338c97478740089.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc1ab373c128eac45ec34fa5afb987a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c03cb0301465ad7c014966867b3024.png)
【知识点】 由基本不等式证明不等关系解读 基本不等式求和的最小值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(2)解关于x的不等式x2-(a+1)x+a<0.
【知识点】 求二次函数的值域或最值 解含有参数的一元二次不等式解读
(1)求实数m的最小值;
(2)若2|x﹣1|+|x|≥a+b对任意的a,b恒成立,求实数x的取值范围.
【知识点】 基本不等式的恒成立问题解读 分类讨论解绝对值不等式解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afeccf0358c02b53554a0f6d3dc33cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cbe9d21eb5f9c566c7cb363c3290f4.png)
(Ⅱ)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e3172a1326420eb5b7a0cf29237e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b566e4851afd2bd3dde9030cba8b87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
【知识点】 利用不等式求值或取值范围解读 基本不等式求积的最大值解读
(1)若ab<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cdbc7f2768532f7a9af74d6a3b1628.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22035e6877347b621d2d6b47f00ae177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a3b3b2bdc2bbf6f0156555d3f5c886.png)
【知识点】 基本不等式的恒成立问题解读 分类讨论解绝对值不等式解读