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命题:对于任意复数z≠0、∞,有Ln(-z)=Ln(z).是否正确,给出证明.同上
命题:对于任意复数z≠0、∞,有Ln(-z)=Ln(z).是否正确,给出证明.同上
发布时间:2021-02-28 06:03:57
命题:对于任意复数z≠0、∞,有Ln(-z)=Ln(z).是否正确,给出证明.同上
网友回答
这个命题不成立.
证明:令arg(z)=α,则当-π
======以下答案可供参考======
供参考答案1:
Ln(z)=ln|z|+i(arg(z)+2nπ)
ln(-z)=ln|-z|+i(arg(-z)+2nπ)=Ln(z)
|z|=|-z|,arg(z)=arg(-z)
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