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Show your work and computations. No credit will be given for unsupported answers. 1) (6 points) Let A2 4 3 echelon form) of A. Note that A is not an augmented matrix. 1 -2 1 3 3 6 6 3Use necessary row operations to obtain the RREF (row reduced 1 -1 3-2 2) (6 points) Find an equation that a, b, e must satisly so that the linear system:1 8rb

i + 2r2-3r J) (s poina)Sole their ytmke the grnerad slatbon formula if the system has infinitely many solutions.

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