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Can the second derivative be 0 and it not be an inflection point

User Qwerty
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hello :
f(x) = x^4
f'(x) = 4x^3
f''(x) = 12x²
the point : O(0;0) it not be an inflection point because f"(x) =0
but f''(x) Without changing signs
User Kalid
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