Question: Need help with explanation 3. (a) Find the points at which the curve y= r - r? -17x - 15 has horizontal tangent lines. (b)
Need help with explanation

3. (a) Find the points at which the curve y= r" - r? -17x - 15 has horizontal tangent lines. (b) Sketch the graph of the curve showing its horizontal tangents. (c) For what values of r is the derivative of f(x) = p - x3 -17x -15 negative
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