For what values of x is the function f(x) = | (x^2)-9| differentiable? Find a
formula for f ' .
唔知係唔係 f(x)={(x^2)-9 if x >=0 同 9-x^2 if x<0 ?
收錄日期: 2021-04-23 23:22:57
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https://hk.answers.yahoo.com/question/index?qid=20110219000051KK00091