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[函数] 多项式组的两个复数根的模长相等,辐角却不相等或相反

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hbghlyj Posted 2021-2-14 09:55 |Read mode
Last edited by hbghlyj 2025-3-11 19:26
  1. RootReduce[Abs[Root[{-1+35#^2&,1+#2^2&,13646161144776014205039-132726401691327480516480# #2-2131275673918902551040#3+16383042361153154625120# #2 #3+823655706307304922240#3^2-1503663306344003481600# #2 #3^2-60384147812724736000#3^3-116891808509753804800# #2 #3^3+7905798781291622400#3^4+21207615409913856000# #2 #3^4&},{2,2,1}]]]
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$$\frac{351}{8 \sqrt{35}}$$
  1. RootReduce[Abs[Root[{-1+35#^2&,1+#2^2&,13646161144776014205039-132726401691327480516480# #2-2131275673918902551040#3+16383042361153154625120# #2 #3+823655706307304922240#3^2-1503663306344003481600# #2 #3^2-60384147812724736000#3^3-116891808509753804800# #2 #3^3+7905798781291622400#3^4+21207615409913856000# #2 #3^4&},{2,2,2}]]]
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$$\frac{351}{8 \sqrt{35}}$$如何证明以上多项式组的两根的模长相等

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kuing Posted 2025-3-11 18:36
是不是应该发到 mathematica 区?

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 Author| hbghlyj Posted 2025-3-11 18:39
kuing 发表于 2025-3-11 10:36
是不是应该发到 mathematica 区?
mathematica 好像只能数值上验证。求数学证明

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