名校
1 . 若复数
,其中i为虚数单位,则
的模是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c6d78a70b90f29ee24dfcfe22bfd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
您最近一年使用:0次
2020-05-14更新
|
93次组卷
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4卷引用:辽宁省营口市部分重点高中2017-2018学年高二下学期期中考试数学(文)试题
解题方法
2 . 若
,其中
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
,
是虚数单位,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdecb8c7c01597a03d9bc98680ed3d5c.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/160daec0ad9ccc242f3e259eb4d61ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
您最近一年使用:0次
2020-05-19更新
|
201次组卷
|
2卷引用:辽宁省营口市部分重点高中2017-2018学年高二下学期期中考试数学(理)试题
3 . 在平面几何中,正三角形
的内切圆半径为
,外接圆半径为
,则
,推广到空间可以得到类似结论:已知正四面体
的内切球半径为
,外接球半径为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4524f95b6f1d1c44aed5308629c756ff.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5498c383e8adc6199cb6dde4ec1791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4524f95b6f1d1c44aed5308629c756ff.png)
您最近一年使用:0次
2017-08-20更新
|
617次组卷
|
6卷引用:辽宁省营口市部分重点高中2017-2018学年高二下学期期中考试数学(文)试题