复数1+i1-i=______；复数(1+i1-i)2010的共轭复数是_____爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

复数

1+i

1-i

=______；复数(

1+i

1-i

)2010的共轭复数是______．

答案

1+i

1-i

=

(1+i)(1+i)

(1-i)(1+i)

=

2i

2

=i

(

1+i

1-i

)2010=i2010=(i2)1005=-1

故答案为i；-1

选择题

—Is there any possibility of Jack ________chairman at the conference?

—Not in the least because audience generally think little of him

A．to elect

B．electing

C．to be elected

D．being elected

单项选择题 A1/A2型题

为确诊首选分段诊断性刮宫的疾病是（）

A.子宫肌瘤

B.子宫内膜癌

C.子宫颈癌

D.卵巢癌

E.不孕症