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13. Using Descartes Rule of Signs, determine the number of possible positive and negative real zeros for f(x) = 3x7+ 4x4 -6x3 + 5x2 -

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13. Using Descartes Rule of Signs, determine the number of possible positive and negative real zeros for f(x) = 3x7+ 4x4 -6x3 + 5x2 - 6x + 1 14. Determine if the Upper and Lower Bound Theorem identifies 2 as an upper bound and -5 as a lower bound for the real zeros of f(x) = x5 + 6x4 + 5x2 + x - 3

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