The parabola representing a quadratic polynomial fx-a x2-b x-c opens downward when

Let nbsp;f(x) = nbsp;ax2 nbsp;+ nbsp;bx nbsp;+ nbsp;c When a gt; 0, the nbsp;parabola representing nbsp;f(x) opens upward. When a lt; 0, ...

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First Derivative Test for Local Maximum

The parabola ...

Question

The parabola representing a quadratic polynomial f(x) = ax² + bx + c opens downward when __________.

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f (x) = a x^{2} + b x + c

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