Suppose that \( f \) is a polynomial of degree 3 and that \( f^{\pr... VIDEO
Suppose that \( f \) is a polynomial of degree 3 and that \( f^{\prime \prime}(x) \neq 0 \) at any of the stationary point. Then
\( \mathrm{P} \)
(1) \( f \) has exactly one stationary point
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(2) \( f \) must have no stationary point
(3) \( f \) must have exactly two stationary points
(4) \( f \) has either zero or two stationary points
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