Question

In Exercises 25 and 26, find (a) the area of the parallelogram determined by vectors u and v and (b) the volume of the parallelepiped determined by the vectors u, v, and w.

25. u = i + j - k, v = 2i + j + k, w =-i - 2j + 3k

26. u = i + j, v = j, w = i + j + k

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