What does infinitely differentiable mean? What does infinitely differentiable mean? @Calculus1
that you can differentiate a function infinite number of times and the derivative is not eqal to 0 with all x(for example, sin(x)) and y=x is not infinitelly differentiable, because the second and higher derivatives are equal to 0
I read that all polynomials are infinitely differentiable. Is that true?
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