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Figure Ex-25
27. Figure Ex-26
(a) Show that if , then the reduced row-echelon form of
(b) Use part (a) to show that the system
has exactly one solution when .
Find an inconsistent linear system that has more unknowns than equations.
28.
Indicate all possible reduced row-echelon forms of
29.
(a)
(b)
Consider the system of equations
30.
