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Exercise 4.12

Enter matrix
and the vector
= [1 2 3 4].

- a)
- Calculate
and
. What happens with the rows and columns of the matrix when performing these multiplications?
- b)
- Make a diagonal matrix
which has the elements of
on the diagonal. Calculate
and
. What happens with the rows and columns of the matrix when performing these multiplications?

Esteur
2010-03-22