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129a_ans_2.8 - Spring 2010 Answer of Section 2.8 2.8#7 a 3...

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Spring 2010 Answer of Section 2.8 2.8 #7 a. 3 b. infinitely many c. YES, because rref h A p i has non-pivot in the last column, hence p is a linear combination of columns of A . 2.8 #9 NO, because A p 6 = 0 2.8 #12 p = 3 and q = 4 2.8 #26 basis of Col ( A ) is 3 - 2 - 5 - 2 , - 1 2 9 6 , 3 7 3 3 basis of Nul ( A ) is
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