List Answer 1

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List Tutorial Exercise 1
------------------------

We can use `v x' to build a vector of integers.  This needs to be
adjusted to get the range of integers we desire.  Mapping `-' across
the vector will accomplish this, although it turns out the plain `-'
key will work just as well.

     2:  2                              2:  2
     1:  [1, 2, 3, 4, 5, 6, 7, 8, 9]    1:  [-4, -3, -2, -1, 0, 1, 2, 3, 4]
         .                                  .

         2  v x 9 RET                       5 V M -   or   5 -

Now we use `V M ^' to map the exponentiation operator across the
vector.

     1:  [0.0625, 0.125, 0.25, 0.5, 1, 2, 4, 8, 16]
         .

         V M ^