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Exercise Set 7.3

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   Find the characteristic equation of the given symmetric matrix, and then by inspection determine the dimensions of the
1. eigenspaces.

       (a)
       (b)

       (c)

       (d)

       (e)

    (f)

In Exercises 2–9 find a matrix P that orthogonally diagonalizes A, and determine  .
2.

3.

4.
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