解题方法
1 . 已知函数
,若
的值域为
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365578ba776509c73562f25395af625e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3814eb9efb5ccd9969ac39bcfbd0ce05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,且
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6fc279f39aff9a69b5806b8cb511338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47722bec469c2d74c5ce73cd07285995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fc838e1477179b36ca7481ee2cc1e8.png)
A.![]() | B.4 | C.![]() | D.5 |
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3 . 美国生物学家和人口统计学家雷蒙德·皮尔提出一种能较好地描述生物生长规律的生长曲线,称为“皮尔曲线”,常用的“皮尔曲线”的函数解析式可以简化为
的形式.已知
描述的是一种植物的高度随着时间
(单位:年)变化的规律.若刚栽种时该植物的高为1米,经过一年,该植物的高为1.5米,要让该植物的高度超过2.8米,至少需要( )年.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710ca6a09c9672d8755211a4d0876b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91524b4103092643cb58fb5a0a289542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.3 | B.4 | C.5 | D.6 |
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4 . 在①角
的终边与单位圆的交点为
;②
;③
这三个条件中任选一个,补充在下面的横线上,并解答问题.
已知
,且
,_________.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3315682b9e4637831870ff5af17b62e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6da48d2b324794c9b001d929f8ce891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3767f60b563bc5b2886d276df9babef4.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9e3b2b77bc9b54f3ae0b332e705c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed53925cace8212e87a4d3bad6463718.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b63b5edaddedf873a242eaff8b41ad7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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解题方法
5 . 已知函数
的图象由如图所示的两段线段组成,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/0dc696b8-5f22-4104-aa0e-3a5e2fe781ca.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/0dc696b8-5f22-4104-aa0e-3a5e2fe781ca.png?resizew=165)
A.![]() |
B.不等式![]() ![]() |
C.函数![]() ![]() |
D.![]() ![]() |
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6 . 某工厂产生的废气经过滤后排放,过滤过程中废气的污染物含量P(单位:
)与时间t(单位:h)间的关系为
,其中
,
是正的常数.如果在前
消除了
的污染物,那么
(1)
后还剩百分之几的污染物;
(2)污染物减少
需要花多少时间(精确到
).参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eba512ba2bf601f4cb87072011e55b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ad7276e3285775e81f1ac435ce15c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bb18444912d23b98036f27f71f3abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733b1ceeead9ff892539d46a23f3626.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2138cadb9dc2538d89a42ed6c39ff72.png)
(2)污染物减少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1065ae0947705c7d16a5a86c78f07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b29f60fc3d32ca94740f0adf3fd0b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9378ccc57cf09c9fa0a7adc0ebb0284.png)
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解题方法
7 . 已知
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baca30d4248a82988890bd032d159b25.png)
A.若![]() ![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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解题方法
8 . 已知二次函数
,对任意
都有
,且
.
(1)求函数
的解析式;
(2)若对于
,不等式
恒成立,求x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663ec6e81eb495df5c251944f4db0ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f4db45b352924b607726828c37467a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc11aca7323cf59bfa48c434bf134576.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769001bb8fcc449918023e4462cffaaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a9495efe38a7055b72dd972db6bfdc.png)
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9 . 已知
是定义在
上且不恒为零的函数,对于任意实数
,
满足
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284042c4d3e634870ccc30d49521dd13.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.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/9b1e393134de4106280668f90d9eac88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3587ff064f9af01371279ab75d22116c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284042c4d3e634870ccc30d49521dd13.png)
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解题方法
10 . 已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e1e3f082683a7b71438fcc8f5b643e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89138ba1a7051b4d5dc54238f314dc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336d38741aab2255a35c26612bbd7cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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