129a_ans_2.9 - Spring 2010 Answer of Section 2.9 2.9 #5...

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Spring 2010 Answer of Section 2.9 2.9 #5 [ x ] B = " 1 / 4 - 5 / 4 # 2.9 #8 [ x ] B = " 2 - 1 # [ y ] B = " 3 / 2 1 # [ z ] B = " - 1 - 1 / 2 # 2.9 #9 a basis of Col ( A ) is 1 - 3 2 - 4 , 2 - 1 4 2 , - 4 5 - 3 7 , dim Col ( A ) = 3 a basis of Nul ( A ) is 3 1 0 0 , dim Nul ( A ) = 1 2.9 #12 a basis of Col ( A ) is 1 5 4 - 2 , - 4 - 9 - 9 5 , 3 8 7 - 6
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