Problem 12 Consider an augmented matrix containing a variable a. 15 3 | 1 | 2a – 5 ба + 1 1 — 15 ба + 1 а — 12a Find any reduced row form (RRF) in terms of a. (Hint: the later parts are easier if you don' divide by something that has a in it.) 12b What values of a give o solutions? 12c What values of a give 0 solutions? 12d What values of a give 1 solution?

Q: (iii) 12 2 3 1 2 3 6:9-69-GD-6) 3 3 3 11 1 1 0 00 1 2 3 4 5 7 8 1 2 3 0 -1 -2 0 0 0 The rank is 2.

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