1 . 若复数
(a,
,
为其共轭复数),定义:
.则对任意的复数
,有下列命题:
:
;
:
;
:
;
:若
,则
为纯虚数.其中正确的命题个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40b6895776e0807c2baecbc8f33a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcfebd9f5a57036e6df6b6e14865da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1d66e23abfd975b8e2c6fd5087071c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b40b6895776e0807c2baecbc8f33a8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415f633ffe375d172196ec8ee18da5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6abd6c7dba2c51002ba8115d37fbcfc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e941154f2992b5b5d574cbd03bcbcad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5688bbcdeaabd349986ed3a03cb3f027.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
解题方法
2 . 设复数
对应的向量分别是
、
,则下列判断中,不正确的个数是( )
① 复数
对应的向量是
② 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6812f9cd174c662e3f98cd9eee376083.png)
③ 若向量
、
的夹角为
,则
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92374cc06be165ccd58034325b9a5df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
① 复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b91254db5ff748150f449c5cdd256c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07938b3394b737e4e763f196e817ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6812f9cd174c662e3f98cd9eee376083.png)
③ 若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e7c2ceddeccaac02f35dbacbccb626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92374cc06be165ccd58034325b9a5df.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次