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[SOLVED] 23-24 pivots and consistency

karush

Well-known member
Jan 31, 2012
2,620
Wahiawa, Hawaii
2020_05_22_16.32.06~2.jpg
ok a pivot column is one of $[0,,,0,b]$ where b is non zero.... b is 1 in RREF
not sure of the best answer but #23 there will be no free variables since 4 equation can derive fout answers altho some asnwera man be the same
#24 we can not derive a 4th or 5th answer with 3 equations