1 . 判断下列各式是否恒等(
,且
).
(1)
和
;
(2)
和
;
(3)
和
;
(4)
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e59d7fda376ea7de5b96e98c9b7c018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd5e7d9dd02334fbf220eee89cdf860.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e168adb7642358ef4c0aa9bcc2efd2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b092abfc01bd3f01bd63f69d79789c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1938a7a366119f6a33a1d0b8988a591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ea4b5b10e1f30cb4e9403029259124.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3463d37c72c7a7b0bd4d380361b94de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8a4bd31071ad5884f9d31190d9a3c3.png)
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2 . 求下列各式中x的值:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff672ee779dd67bc090caf3053f7225.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ef7c51142e345f62d0db710bcef63f.png)
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解题方法
3 . 比较下列各题中两个数的大小:
(1)
,
;
(2)
,
;
(3)
,
;
(4)
,
(
,
).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c7d1356f5cbf9d5d4f0a2aff37180a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bef54275f4e9e8ef9ded08e51997fe.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc3838b938a5908f907591190c81d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c428e57083c670001701f1f77efc870b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d775e7b8db68662937e88754421bbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6266400e2f67ea46c0999179febd1ddb.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38adf264cfcf55a806607dc44497571b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e8e9c327ce93fe75e7f049ee157118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
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解题方法
4 . 如图,A,B,C,D是
,
,
,
四个函数的图象,则
的图象是______ ;
(2)函数
的图象是______ ;
(3)函数
的图象是______ ;
(4)函数
的图象是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f0fadbe551b0e0eb7bf9440be740b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aad480bebb4d5fec03ce8789a7238c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5bbf1426b9fa7c4d49659797ef34ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6b95762e409c1f256579274e574a44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f0fadbe551b0e0eb7bf9440be740b9.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aad480bebb4d5fec03ce8789a7238c4.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5bbf1426b9fa7c4d49659797ef34ae.png)
(4)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6b95762e409c1f256579274e574a44.png)
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5 . 求值:
(1)
;
(2)
(
,
,
,
,
).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a584787be18da959ea1bdb7183a786.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd46fabbb203bc40d09e4cee33cb7f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
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解题方法
6 . 已知
,且
,则指数函数
的图象与对数函数
的图象可能有几个交点?可以借助信息技术软件探索研究.
![](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/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
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解题方法
7 . 求下列函数的定义域:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93683f1d2d1cf12b7d5cab32b6a3bbe6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660efa11e36c224d7735e831f8b170dc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e289b4d4d5efe44cbb3f9f384ee494.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fedfe250205e4b7004fc5d6f08dcae.png)
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8 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b35fa8653fe660bdd23bb473b8f904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8548de3171db215c876e46c42f6878.png)
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9 . 用m,n或b,c表示x,其中m,n,a,b,c均大于0,且
.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9ba448405a3a304be9c6cfbad27a1c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b3e90b617717e7057a3794836c4d0.png)
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解题方法
10 . 已知函数
,当
时,恒有
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1f46f3d31d450248689fdbc7afe202.png)
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