Question: 2.26. (Sec. 2.4) Let (a) Find a vector u '1= 0 so that Iu = O. [Hint: Take cofactors of any column.) (b) Show that

2.26. (Sec. 2.4) Let

-/- = M 2 1 -1 3 -3 3 5 -3 e

(a) Find a vector u '1= 0 so that Iu = O. [Hint: Take cofactors of any column.)

(b) Show that an] matrix of the form G = (H u), where H is 3 X 2, has the property

w 5

(e) Using

(a) and (b), find B to satisfy (36).

(d) Find B- 1 and partition according to (39).

(e) Verify that CC' = I.

-/- = M 2 1 -1 3 -3 3 5 -3 e w 5

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