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(b) u is oppositely directed to

   Find a nonzero vector u with terminal point  such that
5.

       (a) u has the same direction as

       (b) u is oppositely directed to

   Let      ,                    , and          . Find the components of
6.

       (a)

       (b)

       (c)

       (d)

       (e)

       (f)

   Let u, v, and w be the vectors in Exercise 6. Find the components of the vector x that satisfies  .
7.

   Let u, v, and w be the vectors in Exercise 6. Find scalars , , and such that
8.

   Show that there do not exist scalars , , and such that
9.

     Find all scalars , , and such that
10.

          Let P be the point (2, 3, ) and Q the point (7, , 1).
11.

              (a) Find the midpoint of the line segment connecting P and Q.
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