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Mathematics 17 Online
OpenStudy (anonymous):

Use Descartes' Rule of Signs to determine the possible numbers of positive and negative real zeros of f. Then, list the possible rational zeros of f and graph f so that some of the possible zeros in parts A and B can be disregarded and determine all of the real zeros of f. The function given is f(x)=-3x^3+20x^2-36x+16

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