已知
是整数,
是偶数,求证:
也是偶数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2021-08-23 11:48:13
|
相似题推荐
解答题-问答题
|
容易
(0.94)
【推荐1】用反证法证明:已知
,且
,则
,
中至少有一个大于1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab4b75fa22deba7fcbcdcb31dd45b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e131cdd242d56b6dba05ab3363ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
名校
【推荐2】已知平面
平面
,
,
,
且
,用反证法证明:b,c是异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670684ed4962fcebce7b5a140510d066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ccd6a2f9117c17049cf60631bdefcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e076b91a9178217532e11c496400e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c233c892618723489af4dbb77b6a254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b04bdd6afe4e31f65cbfc5093ddb1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc33e9de3088a0f3a3ebe66bd4475f64.png)
![](https://img.xkw.com/dksih/QBM/2021/10/10/2826548410556416/2828235839758336/STEM/af0f7c8a13ac4a54a4097a34375f9217.png?resizew=235)
您最近一年使用:0次