2331_quiz4

# 2331_quiz4 - Math 2331 Quiz 4 Sections 3.1 3.2 and 3.3 This...

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1 Math 2331 Quiz 4 Sections 3.1, 3.2 and 3.3. This is an online quiz; submit your answers using your CASA account. The instructions on how to submit this quiz are given on your instructor’s website. Questions 1—3: Let 2 1 0 2 2 1 . 4 1 0 A = - 1) What is the column space of A? a) ( ) : , scalars x C A y x y x y = + b) ( ) x C A y x y x y = - c) ( ) x C A x y x y x y = + - d) 3 ( ) C A = e) none 2) What is the nullspace of A ? a) 1 ( ) 0 : scalar 1 N A c c     =       b) 1 ( ) 1 : scalar 0 N A c c - = c) 2 ( ) 1 : scalar 1 N A c c = - d) { } ( ) 0 N A = & e) none 3) What is the rank of this matrix? a) 3 b) 2 c) 1 d) 0 e) none

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2 Questions 4—7: Let 1 1 3 2 2 1 0 3 1 0 0 1 0 1 2 A = 4) Which columns are pivot columns?
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2331_quiz4 - Math 2331 Quiz 4 Sections 3.1 3.2 and 3.3 This...

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