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[函数] 含参四次多项式根的分布

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青青子衿 Posted at 2024-10-17 10:04:56 |Read mode
多项式$F(x)=(x^2 + px + q)^2 + 4rx$的实系数满足
\[q^6 - r (p q + r) ((p q + r)^2 + q^3)=0\]
含参四次多项式$F(x)$能不能有四个(非实)复数根?

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2025-4-21 01:29 GMT+8

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