Descartes'ruleofsigns-有句话看不懂
Descartes'ruleofsigns-ThenumberofpositiverealzerosofapolynomialP(x)eitherisequaltothenumberofvariationsinthesignbetweentermsorislessthanthatnumberbyaneveninteger.ThenumberofnegativerealzerosofP(x)eitherisequaltothenumberofvariationsofthesignbetweenthetermsofP(-x)orislessthanthatnumberbyaneveninteger请问下这个.Orislessthanthatnumberbyaneveninteger是什么意思啊
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