Algebra Archive: Questions from April 23, 2022
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2 1 3 4 4 6 A= B=3 -9 - -1 1 4 5 4 (a) Find AB if possible. (b) Find BA if possible. 2 (c) Find Aif possible. (Hint: A+=A:A)3 answers -
(1 point) Let x, y, z be (non-zero) vectors and suppose w = 4y - 4x + z. If z = 2x – 2y, then w = -2 x+ 2 y. Using the calculation above, mark the statements below that must be true. A. Span(w, z) =1 answer