2.設(shè)復(fù)數(shù):為實(shí)數(shù).則x= ( ) A.-2 B.-1 C.1 D.2 [思路點(diǎn)撥]本題考察復(fù)數(shù)的乘法運(yùn)算,可直接計(jì)算得到答案. [正確解答]為實(shí)數(shù).故.即.選A. [解后反思]復(fù)數(shù)有兩個(gè)部分:實(shí)部和虛部.而且復(fù)數(shù)的幾種代數(shù)運(yùn)算,其基本算法也是盡可能將其化成復(fù)數(shù)的代數(shù)形式. 查看更多

 

題目列表(包括答案和解析)

設(shè)復(fù)數(shù):為實(shí)數(shù),則x=(    )

       A.-2                     B.-1                     C.1                        D.2

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設(shè)復(fù)數(shù):z1=1+i,z2=x+2i(x∈R),若z1z2為實(shí)數(shù),則x=

[  ]

A.-2

B.-1

C.1

D.2

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設(shè)復(fù)數(shù):z1=1+i,z2=x+2i(x∈R),若z1z2為實(shí)數(shù),則x

[  ]

A.-2

B.-1

C.1

D.2

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(理)設(shè)復(fù)數(shù):z1=1+i,z2=x+2i(x∈R),若z1z2為實(shí)數(shù),則x

[  ]

A.-2

B.-1

C.1

D.2

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(理)設(shè)復(fù)數(shù):z1=1+i,z2=x+2i(x∈R),若z1z2為實(shí)數(shù),則x

[  ]

A.-2

B.-1

C.1

D.2

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