设
,且满足
.那么,
的值是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195bd1b8d9f459619ef9dfd04657fdf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeaa67f7109df132417a544c4ab0a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2546b62066eea352fad4925e5ec426.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
2019高三·全国·竞赛 查看更多[1]
更新时间:2018-12-27 12:28:25
|
相似题推荐
单选题
|
较易
(0.85)
【推荐2】已知集合
,
、
y∈ R},有下列命题:
①若
则
;
②若
,则
;
③若
,则
;
④若
,则
;
⑤若
,则
的图像关于原点对称;
⑥若
,则对于任意不等的实数
、
,总有
;
⑦若
,则对于任意的实数
、
,总有
.
其中正确命题有个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59be44177a68a0db44f81176b17876c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1398d6442dca842aa213144b45296cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c412f3d930e28ed5f72c6b64829a29c.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/240638527ba5fe20f8144b66e1a04616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0d11f382fdabd327a70efa86cbdd28.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2e6651bfc38dfbc888719937265fc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd7dfe94e5608f501accc85488739cf.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaae2532b0d4633af05a897c5f594735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc23d41696835d78d6695ff60694462e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90eb1c111b1bbff488d3fee6d879a64c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb33638ce09d38d8c9699b272feaf5ef.png)
⑤若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6886b55d27c09955ddb028635777e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db40d5295942e85ec07a3728c7ad308d.png)
⑥若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6886b55d27c09955ddb028635777e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98a73c1d445cf0a2b5521f179186678.png)
⑦若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6886b55d27c09955ddb028635777e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93264d9b95d280912c68aad35be7a414.png)
其中正确命题有个.
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】已知两个不等的锐角
、
,满足
,
,其中,
,且
、
.则
的值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5c743316c231f37676029a445a134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa252f3c69d8cecc8cb61948d2c1c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cceed7ea4aa1b1806bc67b7cfcb949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10570c017a8e9ced002591abf78bc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f03cd478c5006f58e827c5330241340.png)
A.![]() | B.0 |
C.1 | D.不存在 |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】设
、
、
都是锐角.给出下列三个命题:①
,②
,③
、
、
成等差数列.则由①、②、③中两个推出第三个所得的命题中,真命题的个数是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af22b8a9627020041ebb976eb4d4be14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ba7517a258838e45020532d5cb80d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
A.3 | B.2 | C.1 | D.0 |
您最近一年使用:0次