Problems 7079. The purpose of these problems is to keep the material fresh in your mind so

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Problems 70–79. 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.

For the points P = (−4, 3) and Q = (5, −1) write the vector v represented by the directed line segment PQ in the form ai + bj and find ||v||.

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