Question: Problems 76 85. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for

Problems 76 – 85. The purpose of these problems is to keep the material fresh in your mind so that you are better prepared for later sections, a final exam, or subsequent courses such as calculus.

Find the real zeros of f (x) = x5 − x4 − 15x3 − 21x2 − 16x − 20

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