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  3. 3 let u33 2 and wels 1 2 yes compute...

Question: 3 let u33 2 and wels 1 2 yes compute...

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3) Let u33 2, and wE-ls -1] 2 yes, compute them. If any of them is not defined, explain why not. b) Treating u, v, and w as matrices, are the products vu, and ne detined? If yes, compute them. If any of them is not defined, explain why not. 4) If A and B are mxn matrices and k and t are real numbers, prove that a) (A +B)k- Ak+ BAk b) A(k +t) Ak+ At Note that to prove the result you cannot use specific examples. CHINT: Use the representative element notation for the matrices.) Sunnose matrix A is idempotent. Show that A must also be idempotent.
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