计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61db50aa534e0f740b47eff8084a6f6a.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61db50aa534e0f740b47eff8084a6f6a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa462757f74fbf869b61601dd157965.png)
更新时间:2023-10-03 13:05:42
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相似题推荐
解答题-计算题
|
较易
(0.85)
解题方法
【推荐2】阅读以下内容,并回答问题:
定义:如果一个数的平方等于
,记为
,这个数
叫做虚数单位,把形如
(
为实数)的数叫做复数,其中
叫做这个复数的实部,
叫做这个复数的虚部,它的加、减、乘法运算与整式的加、减、乘法运算类似.
例如计算:
;
.
根据以上信息,完成下列问题:
(1)填空:
,
;
(2)计算:
定义:如果一个数的平方等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c789a7cd7ac2b8b96dc879c6c8161ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1a429250008a2b37b39abd1bb4e168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
例如计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea709a86ea7c6cf05dcebb62bd468789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b311d3797324aada9c98438363868e.png)
根据以上信息,完成下列问题:
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bef5a75ca975c523f7233f7a7585f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cda79d660d1cf762b4ccb13c679e93.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015b9f8fe1ffff11227c79f1a4306bda.png)
您最近一年使用:0次
解答题-计算题
|
较易
(0.85)
【推荐2】计算:(1)
+(
)12cos60; (2)(2xy)2(x+y)(xy) .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5a1a7a04d4c10e7a45714482bfb58d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次