在整数集
中,被
除所得余数为
的所有整数组成一个“类”,记为
,即
.给出如下四个结论:
①
,
②
,
③
,
④整数
属于同一类的充要条件是
.
其中正确的个数是___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e854be8d44d7021f8060aebf252284a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7b591d4bb9d6c36118406239af65e0.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb2ef1f35687969ad4987f930254aec.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0f40617bf06d2878ea8cf1bb59f077.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ca4cb73590e54dc62091d7f18dcee6.png)
④整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6800ebb1a624a6bb302da16311225ca.png)
其中正确的个数是
14-15高一上·上海杨浦·期中 查看更多[2]
更新时间:2020-03-08 11:19:40
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名校
【推荐1】给出以下命题:
(1)已知回归直线方程为
,样本点的中心为
,则
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(2)已知
,
与
的夹角为钝角,则
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(3)函数
图象关于点
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(4)命题“存在
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恰有三个零点,则实数m的取值范围为
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其中不正确 的命题序号为______________ .
(1)已知回归直线方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25df027f2bdf65a1ffdd03fc2608377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92418f910b93502041350259b221ea34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb65513075a26d16bb69f2ed550c0791.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5112cbffb04be482ca0b09bdb9b5df35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ba49b31a5afc390ac8835fe5ebbb66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1d1d16dc32dfbe9bb9154e97664341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c16c64869cf25374d05b130415a5013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e10dc60362ba61cd036365eb4d2caa.png)
(4)命题“存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e2acc37cf685dbd258ef9cffd40a3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa64caceb1a517814c8756c0246bc8.png)
(5)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae58ac8693a7f5f7570b6cbdb5c07c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e409849c921f4868c5a78abffb9f74bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
其中
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【推荐2】给出下列命题:
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②若
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③若
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④若
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其中正确命题的序号是_________ .
①纯虚数z的共轭复数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b2c0b7e9d2782622f8d9b8b4112a55.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef84620e3e7b990e9736d27ec8442db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13d477ec252f1952efd7d97425bf40c.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99cbc872a716e6ff5d0b55c4e9a55a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa224ed9be8766a4d0b5138bd57de0f0.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef84620e3e7b990e9736d27ec8442db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68f652b4c13657ffddf3c9e7eb262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2543268777eb18afe34a4994fbca6d.png)
其中正确命题的序号是
您最近一年使用:0次