解题方法
1 . 已知函数
在定义域
上是减函数,则
的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e109cbb0ee4f586625c7380a93a029a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.3 | B.2 | C.1 | D.![]() |
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2 . 已知函数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38191b18812f4142f49e9ca639a64a2.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() |
D.![]() ![]() ![]() |
您最近一年使用:0次
3 . 已知函数
,且
有
个零点,则
的可能取值有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5cf0160fbe7dde2a76727f420da9a14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e211551bab11dfd526f3b8a4338b5ad8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
4 . 函数
,
,方程
恰有三个根
,其中
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f03aa94aa573f88b633687da1cb1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdc6a4f81bb2ce0d19bd592c07165a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8bfb563f79688d136e0cb958b5153c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5064784350df94d31393826ae6fbd2a3.png)
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5 . 已知函数
,对
都有
,且在
上单调,则
的取值集合为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a824bb73d7ad666f262e12e083e294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53fbac4f971e123a177665ad6fe88f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15eaa3b4287de970b7136e72c002261a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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解题方法
6 . 设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f4b6f2d54ebe4a54d9942a1f6f0fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8e41aa4530d6a4e1d05225c1bf16e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff52cb77bc96e5b391d0bd06b05bde6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图所示函数的图象,则下列函数的解析式最有可能是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/f31ecd8a-1720-4b7e-9846-b206aedec629.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/f31ecd8a-1720-4b7e-9846-b206aedec629.png?resizew=178)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 近年来,“无废城市”、“双碳”发展战略与循环经济的理念深入人心,垃圾分类政策的密集出台对厨余垃圾处理市场需求释放起到积极作用
某企业响应政策号召,引进了一个把厨余垃圾加工处理为某化工产品的项目
已知该企业日加工处理厨余垃圾成本
单位:元
与日加工处理厨余垃圾量
单位:吨
之间的函数关系可表示为:
.
(1)政府为使该企业能可持续发展,决定给于每吨厨余垃圾以
元的补助,当日处理厨余垃圾的量在什么范围时企业不亏损![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
(2)当日加工处理厨余垃圾量为多少吨时,该企业日加工处理每吨厨余垃圾的平均成本最低
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c61e103a765e2069a4615dd43ffd2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285912b40e1dce8bfc029df88115c961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4be7317ce2d7a32e2dbf1bafc9841d.png)
(1)政府为使该企业能可持续发展,决定给于每吨厨余垃圾以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f534536cc2ccc32cc535e6a5561f99a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
(2)当日加工处理厨余垃圾量为多少吨时,该企业日加工处理每吨厨余垃圾的平均成本最低
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
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解题方法
9 . 已知角
的终边经过点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b345fcbad3bce4e0f2f59d017349513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 命题“
,
”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f09d569d58fdd87f43043613ab0067f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecdb368eeca175e182c8129654a2e9f.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次