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OpenStudy (sloppycanada):
Which of the following is an upper bound for the zeros of f(x)=2x^3-4x^2-x-2 -1 1 2 3 I don't think it's any of these.
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Directrix (directrix):
The Upper and Lower Bounds of Real Roots and how to find them are attached.
Directrix (directrix):
For your problem, y =2x^3-4x^2-x-2, prepare the coefficients for synthetic division. Test the last option 3.
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