vectors

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Given the vectors v=-2i+5j and w=3i+4i, determine
(do I just plug what is given? but how would I find the length? is there a special way to solve vectors?)

1. 1/2 v
2. w-v
3. length of w
4. the unit vector for v

Use the pythogrean theorm to find length of w, i,j are at right angles to each other. The unit vector is the vector divided by length.

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