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/8533f7de4bb118908b0669b3fcbbcce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e7cab169e63786728c0fd4af7163f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369b62393cc5ab8fc1fb98b6f0cc238a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c3fe4b8a1cb46d3a262a8b157454a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99769b9ad1942769c16a7c67e364e33a.png)
A.2 | B.3 | C.4 | D.5 |
【知识点】 对数的运算性质的应用
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 根据对数函数的值域求参数值或范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(结果采取“只入不舍”的原则取整数,相关数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87d922f294f2696c2b12d2a7d2f8b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282724a3b2b45f1966a91389fdcedfcf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 等比数列的简单应用
![](https://img.xkw.com/dksih/QBM/2014/2/25/1571527185080320/1571527190577152/STEM/06402324b60f42cca5e4de8aa4173a03.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2014/2/25/1571527185080320/1571527190577152/STEM/d30c7ebe8a624a5a8bac8fc2fe301b2a.png?resizew=50)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b8177461a6adb19db6aaea8cd6fbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8d299ef49de2a6906fc1fea1dc1c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7119fd623a86a9f0cbc2543690b55215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831da559ea9f04824ed38b1ffba61f9e.png)
![](https://img.xkw.com/dksih/QBM/2014/2/25/1571527185080320/1571527190577152/STEM/06402324b60f42cca5e4de8aa4173a03.png?resizew=61)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7221de2cf57e9695bc4769ca47c358c.png)
A.13 | B.12 | C.11 | D.10 |
【知识点】 函数图象的应用 求函数零点或方程根的个数
二、填空题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1ab273f93357823d08f9a89f546430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b07bbc1c6790954167ccfc468add54f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf82c29786bf5e395bddad7a3065f8f1.png)
【知识点】 指数式与对数式的互化 根据零点求函数解析式中的参数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9afb528423ed6c19355ca8bd8f2359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d166c85ee9a98c97ce751a2a4fe304a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896948e161b0515296bbc864ad927936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d4ac4b413c8845c3fe1cff533d081b.png)
【知识点】 反函数的性质应用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6290743e55411097d9cae2b38b2266c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79cbc82b89a41e5f2412b049a1223d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
【知识点】 根据函数的单调性求参数值解读 对数型函数图象过定点问题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e883e5815f949f9ffc387e613941e115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d82c085f54dc5a3d4c02ac9975be9c4.png)
我们将⊗式称为证明的“关键步骤“.则证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e759bf8d65b443078b175210c546caf9.png)
【知识点】 指数式与对数式的互化
三、解答题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fb0ed765325b27c405d8071cc9d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996ec7256ee8ba6359e9a8cec01aaca4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f95d91170f224d525fac20d7cb4ccd8.png)
【知识点】 指数幂的运算 指数式与对数式的互化 对数的运算 求对数函数的解析式
(1)求函数f(x)的定义域并判断函数f(x)的奇偶性;
(2)记函数g(x)=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dcfac0d972cde077d832257310ede0.png)
(3)若不等式 f(x)>m有解,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792983ebc5d6eb291e814b5f3a3199c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅲ)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ac483c9d6074ab46b2242c1d11bb0a.png)
(1)对数的运算性质降低了运算的级别,简化了运算,在数学发展史上是伟大的成就.对数运算性质的推导有很多方法.请同学们根据所学知识推导如下的对数运算性质:如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8905be1335a8703769b0ad90eb6b1603.png)
(2)请你运用上述对数运算性质计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d04fb0e77ae84eac3778e2515e07ff0.png)
(3)因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debc5f7846c70bdfb5911af22b83558f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5bdc4ab4fd3f97dc0fd63038015386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3008d7758cef3054fc1ddfb1c8129bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba796ed1b8e9132a66d4b4aff0d4d933.png)
【知识点】 对数函数模型的应用(2)