[微分] 問題問題

[JimCroce (我要下五子棋 ￾N￾ )]

  Suppose f is function with the property that

  l f(x) l  小於等於 x^2  for all x. Show that f is differentiable at 0.
  ^^^^^^^^^
  絕對值f(x)



  請問怎麼show在0不可微?    謝謝回答!



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推 hwujialuen:differentiable???這不是可微分嗎?
→ hwujialuen:幹麻又要証不可微???
推 JimCroce:看錯了啦SORRY