解题方法
1 . 已知函数
.
(1)若
时,求
的定义域;
(2)若函数
的图像关于直线
对称.
①求a,b的值;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9453acce2c4269123931aa2f501442c2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3440745ce66413cd501dbabeff44cd60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b334dafda377c3db77647c8cf1e95f.png)
①求a,b的值;
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfcdbfa315aa31287588d98cdfaddf3.png)
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解题方法
2 . 已知函数
.
(1)求证:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0016c875ebc4446e37992424a90e8137.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72da6a31a4eda3f3acce4bf3ee479f7f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d444c36795751b60969de3904b18d6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解题方法
3 . (1)已知
,
,
都是正实数,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b266ea51b4019ca1e7974f97c9e5c740.png)
(2)设
,且
,求证:
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b266ea51b4019ca1e7974f97c9e5c740.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff6d61a8eaff20b364a9e3235577c69.png)
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名校
4 . 对于题目:已知
,
,且
,求
最小值.
甲同学的解法:因为
,
,所以
,
,从而
,所以
的最小值为
.
乙同学的解法:因为
,
,所以
.所以
的最小值为
.
丙同学的解法:因为
,
,所以
.
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)已知
,
,且
,求
的最小值;
(ii)设
,
,
都是正数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a120e118263f6b9fde8054e1a57479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bc579ce6e76737b53377b5c44b72b8.png)
甲同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee7c17173292f5f25112364145143fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a62cd42aaaa823c0b862c8449b4a78e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba18dd6634f04aaf102c929c14095c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453ea8f3a2b85526b54bf453871c3820.png)
乙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831ec03409081480f2943a55749ea0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
丙同学的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b421a2b4f2ccc36be8416a6f21cdfed3.png)
(1)请对三位同学的解法正确性作出评价(需评价同学错误原因);
(2)为巩固学习效果,老师布置了另外两道题,请你解决:
(i)已知
![](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/c0b256fd7584a2f3d3bd45b503a286e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf89638b5a0ed9a8b35260b042b691d.png)
(ii)设
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533937a08d1ed87594ac52c658be9649.png)
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2023-10-20更新
|
274次组卷
|
3卷引用:辽宁省大连市第八中学2023-2024学年高一上学期10月月考数学试题
名校
解题方法
5 . 选用恰当的证明方法;解决下列问题.
(1)
为实数,且
,证明:两个一元二次方程
,
中至少有一个方程有两个不相等的实数根.
(2)已知:
,且
,求证:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1476efe1fd8970d815af8a6e62d454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341f6b48e2c616585ed9bd7dbb9c8728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3ce04492780c4d40fab17aa28d3755.png)
(2)已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c96a416540d6d2c2570c7106f5e0492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03f1c0c0618a585e86afc523bd523e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356bc29ee1bc3f046d9a7b2804c77cf9.png)
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2023-10-14更新
|
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|
2卷引用:辽宁省大连市金州区金州高级中学2023-2024学年高一上学期10月月考数学试题
名校
6 . (1)
为实数,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f25298d03745e6d91799449ed9e96a.png)
(2)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f25298d03745e6d91799449ed9e96a.png)
(2)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b492c09f576ab6491af4848ce7ecec4.png)
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7 . 已知集合
的子集个数为
.
(1)求
的值;
(2)若
的三边长为
,证明:
为等边三角形的充要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ce22a79915802052a731ea4eb70a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8858e7b26a1860f4c4e0da7da33bbada.png)
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2023-10-13更新
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8卷引用:辽宁省部分高中2023-2024学年高一上学期10月月考数学试题
解题方法
8 . 已知正数a,b满足
;
(1)求ab的最大值;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d34836cf6d21bcadd4f60793ba150.png)
(1)求ab的最大值;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296a77a7ca3e70fba643654bf5a99a3b.png)
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2023-10-12更新
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5卷引用:辽宁省县级重点高中联合体2023-2024学年高一上学期10月联考数学试题
名校
解题方法
9 . 设实数
满足
.
(1)若
,求证:
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf913c92060a7bad4de1ee8c04d011e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a9344f4fca7b9779ca7720e5277ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94752276c75f22d290087179226d450f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c7bf45f9250579251fbbf382b32fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2023-08-12更新
|
608次组卷
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3卷引用:辽宁省大连市第八中学2022-2023学年高一上学期10月月考数学试题
名校
解题方法
10 . (1)已知
都是正实数,求证:
.
(2)设
,且
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef3052cd1be7641eb559c5d7ed142cb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff6d61a8eaff20b364a9e3235577c69.png)
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