[中學] 多項方程式的重根
如何證明實根中的偶數重根(例如二重根,四重根..)
必為極值點?
假設f(x)=(x-a)^2k.Q(x),k為正整數,Q(a)不為0
可否證明f'(x)在x=a前後,導數異號?
或有其他想法?
被家教學生問倒了,請高手幫忙。
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