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Mathematics 30 Online
OpenStudy (anonymous):

The graph of f(x) = 2x^3 + 12 x^2 - 126 x + 16 has two horizontal tangents. One occurs at a negative value of x and the other at a positive value of x. What is the negative value of x where a horizontal tangent occurs? What is the positive value of x where a horizontal tangent occurs?

OpenStudy (anonymous):

why are you double posting?

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