truefalse sampel 3

# truefalse sampel 3 - 5 For the true-or—false questions...

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Unformatted text preview: 5. For the true-or—false questions, encircle True or False; then give a reason if the assertion is true or a counterexample if the assertion is false. 0 (a) True or False: If A is an n x n matrix and the system AX = B is consistent for some B, then A is inv rtible. 1% K - A ~— 0 (b) True or False: For any two n x n matrices A and B, if AB = 1,, then BA = In. .[0-0 0 5 7+0 40 mnmdmsmgw gm 0 o \$533 2 museum/imammawe ‘0 (i) 0 l (3 0 WEEK W o too 010 0 o 5 mi? ism/51mm” W33 pmst o (d) Tru or False: If A and B are invertible n X n matrices, then A + B is invertible. I A w B {7g (0 2300:) < l I o (e) True or False: Suppose that A and B are n x n matrices that both have linearly independent columns. Then A and B have the same reduced row echelon form. l? .mﬂjtgs as. W sant ems m’ﬂﬁﬁ mics m tics/\$9 ﬂltl‘ ! “3* m 652me. \2. < 08) mismaimlsm “ RREF 9 ...
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