在
中,“
”是“
”的什么条件( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b6662c6f84e1c97c9d05d9ae62c1eb.png)
A.充分不必要 | B.必要不充分 | C.充要 | D.既非充分也非必要 |
更新时间:2021-03-23 09:28:07
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】下列说法中正确的个数为( )
①“方程
表示的是圆”是“
”的充分不必要条件;
②
中,“
”是“
为等边三角形”的充要条件;
③若
为非零向量,则“
”是“
的夹角是锐角”的必要不充分条件.
①“方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd7f9b8e11e94e6f3b98d504dad932c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b894738a0c1d7e580df8ad1161fe4f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3425583b1fdc6563fffd794625a94c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a701940ab6f877e2db4621db74e4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
A.0 | B.1 | C.2 | D.3 |
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【推荐2】一元二次方程
(
)有一个正根和一个负根的一个充分非必要条件为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c9901b9202f889f3e5feba8eef1395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
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较易
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名校
解题方法
【推荐1】已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7449bb08aad5b016fd07d4e564a843d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba70958be8a26e89f7c3e0181ce3b21.png)
A.![]() | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
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名校
【推荐2】已知
是函数
的一个极值点,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0726c7ffaf956ea4e2d6b5a736dcd02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37efe66aaf2bde8ee92902cf211caba.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】在
中,
,
,
分别是角
,
,
的对边,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963e01f80c354bc1b17f4bea7dc10fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f9fabbbe61a759e52ec975215e2e7c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次