名校
1 . 已知复数
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb5c7b22f5eaf647d28a5cc7bdaf1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d67321ace1e6b3be0fc0e5e8130022.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 若复数
,则
的共轭复数
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8f500173e71572e707aeff49064bb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545141bbe7cc66d18946a129179d8df1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 .
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2cdefcca6c6eb7c9208b3de1c008aa9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知复数
,
(
为虚数单位)在复平面上对应的点分别为
,则
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95423c449f5d44dd949bf3b0130946f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6cef94c1bce90f6573fd0315db6b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38033198bf936b904a8c74db67e4cdcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5927f1967a8f72e8fb887edb5023a921.png)
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5 .
的二项展开式中
的系数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac252a8b5b997a4f032c42b3aa1425f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.40 | C.![]() | D.80 |
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解题方法
6 . 在
中,角A、B、C的对边分别为a、b、c,已知
.
(1)求角A;
(2)若
,
周长为6,求
的面积;
(3)若
为锐角三角形,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac31cf4766d4c2621e08cd8bc2cb1028.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b292a8835d2b23ecc22bc2097eeb4f.png)
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7 . 在
中,角A、B、C的对边分别为a、b、c,
,
,若
.
(1)求
的值;
(2)若
,
,求b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76d07534853b9828445e1fdf1bb9c0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2df33caed7e9330d0efc71bf3ca0c770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d070c5939bb0ec4a9d40d7e3c7d3f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7be3207fe019a39dc2a00b5d624958.png)
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8 . 设
,则
=______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b1ddfd074012b1736ae721bd63de102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce48af55c99256efdc68fac0767d944c.png)
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9 . 如图,四面体ABCD的各个面都是全等的三角形,且
,若A,B,C,D在同一个球面上,则下列正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceda140bfed9920af9fdaa1a2e9b3be8.png)
A.直线AB,CD所成角为![]() |
B.二面角![]() ![]() |
C.四面体ABCD的体积为![]() |
D.四面体外接球的半径为![]() |
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解题方法
10 . 如图,在平行四边形
中,
,
,点F为BC的中点,则下列正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf80b036459da6dcb841a4bbe3859fc.png)
A.![]() | B.![]() |
C.![]() ![]() ![]() | D.![]() |
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