Do problem 6.2.5 on page 216.
Assume A' is upper-triangular and has been augmented with b'
as its final column,
and that it is indexed in the expected way
(e.g. A'[i,j] is the entry in row i and column j).
The solution should be placed in a vector x
(e.g. x[1] will store the value of x1, etc.)
Hint: Pay careful attention to how you solved systems with 3 or 4 variables. Which variable did you solve for first?
How did you find each of the remaining variables? You should realize
that the process you followed can be captured by a simple formula.
Do not forget to analyze your algorithm.
(Hint: You will need to express it using one or more sums which you will
then need to simplify.)