若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d81e116367a6599c940fc2fa6356b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6d2b84fdfe3fc07bcd37052dedf416.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-03-25 13:19:56
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相似题推荐
单选题
|
较易
(0.85)
【推荐1】设
,则“
”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388d3d213a231cccf854a29eef611d01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2dc650b6a57a9fa9d56c9e292906b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d0ebb77cc0f9b95d07111ec88a545f.png)
A.充分非必要条件 | B.必要非充分条件 |
C.充要条件 | D.既非充分也非必要条件 |
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单选题
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较易
(0.85)
名校
【推荐1】已知函数
,
,若
在区间
内没有零点,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038bfac6428902d67071914a3f1ac14c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919c2dff2c78e62552a0d65105d350fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
【推荐2】正割(
)及余割(
)这两个概念是由伊朗数学家、天文学家阿布尔威发首先引入,
,
这两个符号是荷兰数学家基拉德在《三角学》中首先使用,后经欧拉采用得以通行.在三角中,定义正割
,余割
,则函数
的值域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b292c2d1a14944535cecfff932f5fd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561e3cad04ddb3c663bd00aa4b4f84fd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70bb595ce2e7a46f62577b21d27b477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a795c9a8966a71deec4182eea04e30ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685fa335dc12bca7c73b8bed162a9fc7.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() ![]() | D.![]() |
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