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Math 2890 Sample Exam Problems

Adding vectors


Let $v=\left(\begin{array}{r} 1 \\ 1 \\ 6 \\ 5 \end{array}\right)$ and $w = \left(\begin{array}{r} 5 \\ -9 \\ -3 \\ -9 \\ 7 \\ -7 \end{array}\right)$.

Compute the sum $v+w$ if it is defined; otherwise, explain why it is not defined.


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