名校
解题方法
1 . 已知函数
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42d73ab2bceb7cca95669e39dcbf7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94475b3d8a67ebfffc45210d7d1ee4c8.png)
A.1 | B.![]() | C.2 | D.4 |
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2 . 已知函数
,
.
(1)若直线
是曲线
在
处的切线,求
的表达式;
(2)若任意
且
,有
恒成立,求符合要求的数对
组成的集合;
(3)当
时,方程
在区间
上恰有1个解,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b923078510697d5f7f9ea392eb76dd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4935611969e644511329f6b0dbbf3b.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779857e2a9f13158fb4cf5988debceca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5223ece2f8f76850c49e2505304532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eaa16e4de765a7127b2a4aa8302cef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a5286cdf08218995b1514c195494e3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298b861acdad2f218a882319c1a3280a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a531b9769bfba66a10139b153f09307c.png)
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3 . 已知
,那么
的近似值为______ .(保留小数点后一位数字)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2493a9847bdf4e7e0cb5da764d62a4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf6d10885fb83ded00d4e39532fcd10.png)
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解题方法
4 . 已知函数
及其导函数
的定义域均为R,若
是奇函数,
,且对任意
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aab45a72f14c60ed311f050a11dd361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64541d7f445079207b6f671adc7d662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c02b0800a67b502e2560459c326a07b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 某酒杯上半部分的形状为倒立的圆锥,杯深
,上口宽
,若以
的匀速往杯中注水,当时间为
时,酒杯中水升高的瞬时变化率是______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5b538e847547bbb9e29ecc89800193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b7a662db44251ff09d2bc4cd5574bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d1461f3b7f2a8a65097c8de1dcbfc7.png)
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解题方法
6 . 已知抛物线
,点
在抛物线
上.
的切线的斜率为
;
(2)过
外一点A(不在x轴上)作
的切线AB、AC,点B、C为切点,作平行于BC的切线
(切点为D),点
、
分别是与AB、AC的交点(如图).
(i)若直线AD与BC的交点为E,证明:D是AE的中点;
(ii)设三角形△ABC面积为S,若将由过
外一点的两条切线及第三条切线(平行于两切线切点的连线)围成的三角形叫做“切线三角形”,如
.再由点
、
确定的切线三角形
,
,并依这样的方法不断作1,2,4,…,
个切线三角形,证明:这些“切线三角形”的面积之和小于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393dfed4141a606a8aba9b4db21c1c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12637403dddfe351b9e3eacbd6ac2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa4e9d7d044658001c41e2ca2dfb82b.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(i)若直线AD与BC的交点为E,证明:D是AE的中点;
(ii)设三角形△ABC面积为S,若将由过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1dc5667bbf205d6c6c6d189ebda123e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfaa7a1d2e3b0555ce86e3db435c19e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00117e8ba0b2e730872d7ab6f26666b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f1ad18371ec533aeac27cf1fad95c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d903ee24de929de0fc7bc8e45f6c6686.png)
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7 . 已知函数
的图象如图所示,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2264e38913d2452521c579e6a110965d.png)
A.函数![]() ![]() |
B.![]() |
C.将函数![]() ![]() ![]() ![]() |
D.函数![]() ![]() ![]() ![]() |
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8 . 极值的广义定义如下:如果一个函数在一点的一个邻域(包含该点的开区间)内处处都有确定的值,而以该点处的值为最大(小),这函数在该点处的值就是一个极大(小)值.
对于函数
,设自变量x从
变化到
,当
,
是一个确定的值,则称函数
在点
处右可导;当
,
是一个确定的值,则称函数
在点
处左可导.当函数
在点
处既右可导也左可导且导数值相等,则称函数
在点
处可导.
(1)请举出一个例子,说明该函数在某点处不可导,但是该点是该函数的极值点;
(2)已知函数
.
(ⅰ)求函数
在
处的切线方程;
(ⅱ)若
为
的极小值点,求a的取值范围.
对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47db6b322f19cefcd70d0f8433917f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1459527045d2d138d1ee4b441aade53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e6c43466d743ea37287656b85821c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570e972f51cd1d11acfd80a01c0512fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e6c43466d743ea37287656b85821c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(1)请举出一个例子,说明该函数在某点处不可导,但是该点是该函数的极值点;
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae34b02b147bb49131a01316e07efaf.png)
(ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1735755a0f13e329df682712dd1d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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9 . 英国经济学家凯恩斯(1883-1946)研究了国民收入支配与国家经济发展之间的关系,强调政府对市场经济的干预,并形成了现代西方经济学的一个重要学派一凯恩斯学派.机恩斯抽象出三个核心要素:国民收入
,国民消费
和国民投资
,假设国民收入不是用于消费就是用于投资,就有:
.其中常数
表示房租、水电等固定消费,
为国民“边际消费倾向”.则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c091995984360f1a08bd303bca92d4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a4419261e9fe3dcf547349aa42dad2.png)
A.若固定![]() ![]() |
B.若固定![]() ![]() |
C.若![]() |
D.若![]() ![]() |
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解题方法
10 . 已知函数
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d146b02847bb127c2fadb253e587d7d.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce427e97019745d570dd2728027fba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d146b02847bb127c2fadb253e587d7d.png)
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