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AkshayKumar Group Title

It's true that if f is differentiable in (a,b) then f is continuous in (a,b). But would it be correct to say that if f is differentiable in (a,b) then f is continuous in [a,b] ?

  • one year ago
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  1. henriquerb Group Title
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    I don't think it's necessarily true. I mean, it could be true, but could also be false.

    • one year ago
  2. pasta Group Title
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    All differentiable functions are continuous on that same interval.SO THE FIRST STATEMENT IS TRUE. but NOT all continuous functions are differentiable .SO FOR THE SECOND STATEMENT I THINK IT IS FALSE.

    • one year ago
  3. L.T. Group Title
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    Pasta is right. Just consider most rational power functions and the absolute value function.

    • one year ago
  4. AbbasBagwala Group Title
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    If f(x) is differentiable at (a,b), then it has to be continuous the the same point. But, it is not necessary that every continuous function is differentiable. For example: f(x) = |x| Hence we conclude that 1) Differentiability implies continuity 2) Continuity does not imply differentiability.

    • one year ago
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